Kenton Crowley v. Epicept Corp. ( 2018 )


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  •                         FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    KENTON L. CROWLEY; JOHN                          No. 15-56571
    A. FLORES,
    Plaintiffs-Appellants,                   D.C. No.
    3:09-cv-00641-L-BGS
    v.
    EPICEPT CORPORATION,                               OPINION
    Defendant-Appellee.
    Appeal from the United States District Court
    for the Southern District of California,
    M. James Lorenz, Senior District Judge, Presiding
    Submitted April 5, 2017*
    Pasadena, California
    Filed February 13, 2018
    Before: Kim McLane Wardlaw and Consuelo M. Callahan,
    Circuit Judges, and Gordon J. Quist, Senior
    District Judge.**
    *
    The panel unanimously concludes this case is suitable for decision
    without oral argument. See Fed. R. App. P. 34(a)(2).
    **
    The Honorable Gordon J. Quist, Senior District Judge for the
    United States District Court for the Western District of Michigan, sitting
    by designation.
    2                  CROWLEY V. EPICEPT CORP.
    Per Curiam Opinion;
    Dissent by Judge Wardlaw
    SUMMARY***
    Jury Instructions
    The panel affirmed the district court’s judgment in favor
    of EpiCept Corporation in a diversity action brought by
    doctors alleging claims arising from their assignment to
    EpiCept of two patents for a non-FDA approved drug and
    EpiCept’s failure to develop those patents into FDA-approved
    drugs.
    The panel held that the district court did not abuse its
    discretion in formulating the jury instructions, or in
    determining that the jury’s verdict was not against the clear
    weight of the evidence.
    Specifically, the panel held that the doctors waived two of
    their challenges to the jury instructions. The panel further
    held that the challenged instructions correctly stated the law,
    and the jury was clearly and adequately informed that only a
    material breach by the doctors could defeat their breach of
    contract claim against EpiCept. Accordingly, the district
    court did not abuse its discretion in denying the doctors’
    request for a new trial on this ground. Finally, the panel
    rejected, as harmless error, the doctors’ challenge to the jury
    instructions, or lack thereof, relating to EpiCept’s position at
    ***
    This summary constitutes no part of the opinion of the court. It has
    been prepared by court staff for the convenience of the reader.
    CROWLEY V. EPICEPT CORP.                      3
    trial that even if it had breached the parties’ agreement, the
    doctors were not entitled to return of their patents as a
    remedy.
    The panel rejected the doctors’ challenge to the district
    court’s response to the question posed by the jury during
    deliberations. The panel concluded that the district court’s
    original instructions to the jury were adequate and accurately
    stated New Jersey law, and the jury’s question did not
    indicate that the jury was interpreting the law incorrectly.
    Accordingly, the district court did not abuse its discretion in
    referring the jury back to the instructions already given and
    the evidence presented at trial.
    The panel rejected the doctors’ challenges to the verdict’s
    evidentiary basis. The panel held that the doctors waived
    their right to directly challenge the sufficiency of the
    evidence by failing to make the appropriate Fed. R. Civ. P. 50
    motions. Concerning the doctors’ motion for a new trial
    under Fed. R. Civ. P. 59, the panel held that the district court
    did not abuse its discretion in denying the motion where there
    was sufficient evidence of a material breach of the agreement
    under New Jersey law.
    Judge Wardlaw dissented, and would reverse and remand
    for a new trial. Judge Wardlaw would hold that the jury’s
    verdict was not supported by substantial evidence because no
    rational jury could find material breach on the evidence
    presented, and, that the district court inadequately instructed
    the jury on this claim.
    4                CROWLEY V. EPICEPT CORP.
    COUNSEL
    Karen A. Larson, Karen A. Larson P.A., Dana Point,
    California, for Plaintiffs-Appellants.
    Philip Tencer, TencerSherman LLP, San Diego, California,
    for Defendant-Appellee.
    OPINION
    PER CURIAM:
    This appeal follows the trial on Drs. Crowley and Flores’s
    (the Doctors) claims against EpiCept Corporation (EpiCept)
    for breach of contract, breach of the implied covenant of good
    faith and fair dealing, and fraud. The Doctors’ claims arise
    from their assignment to EpiCept of two patents for a non-
    FDA approved drug (referred to as “NP-2”) and EpiCept’s
    failure to develop those patents into FDA-approved drugs.
    Following an adverse jury verdict, the Doctors take issue with
    certain jury instructions, the district court’s answer to a jury
    question, the evidence supporting the verdict, and the district
    court’s exclusion of the Doctors’ expert. The majority of the
    Doctors’ arguments center on the jury’s determination that
    the Doctors materially breached their contract with EpiCept
    by failing to disclose that Dr. Flores treated burn patients with
    NP-2. We find that the district court did not abuse its
    discretion in formulating the jury instructions, or in
    determining that the jury’s verdict was not against the clear
    weight of the evidence. Accordingly, neither the jury
    instructions given in this case nor the evidence presented at
    trial warrants the do-over the Doctors demand. The district
    court’s response to the jury’s question also does not merit a
    CROWLEY V. EPICEPT CORP.                      5
    new trial, as the jury’s question was essentially factual and
    the court’s answer appropriately directed the jury to consider
    its original instructions and the evidence presented at trial.
    Finally, because we affirm the jury’s finding that the Doctors
    materially breached the contract, the district court’s exclusion
    of the Doctors’ damages expert was necessarily harmless.
    Accordingly, we affirm.
    I. BACKGROUND
    A.
    The Doctors jointly invented a process for the preparation
    of ketamine ointment (U.S. Patent No. 5,817,699) and a
    method for the preparation of the same ointment containing
    various amounts of ketamine and butamben (U.S. Patent No.
    5,817,961). The cream, also referred to as NP-2, is designed
    to treat six types of pain. EpiCept was a private
    pharmaceutical company that focused on developing
    technology for pain management. EpiCept secured funding
    through private venture capital.
    The Doctors and EpiCept entered into a contract in
    December 2000 (the Agreement), in which the Doctors
    agreed to “assign to EpiCept [their] entire right, title and
    interest in and to the Invention, any Improvements,” and the
    patents themselves. Dr. Crowley and Peter Golikov,
    EpiCept’s then-President and Chief Operating Officer,
    negotiated the Agreement. EpiCept paid a $300,000 up-front
    assignment fee and agreed to pay the Doctors royalties on
    commercial sales. The Agreement also contained a New
    Jersey choice-of-law clause. Section 2.1 of the Agreement
    required the Doctors to “provide written notice to EpiCept of
    each Improvement within thirty (30) days of the date of
    6                CROWLEY V. EPICEPT CORP.
    conception of such Improvement or, if conceived prior to the
    Effective Date [of the Agreement], then within ten (10) days
    after the Effective Date . . . .” The Doctors were also
    required to assign any improvement to EpiCept. Section 1.3
    defined an improvement as “any modification of the
    Invention that is, on or after the Effective Date, or was, prior
    to the Effective Date, invented, conceived and/or reduced to
    practice by [the Doctors], provided that such modification or
    the use thereof would, if unlicensed,” infringe one of the
    patents. Section 10 provided the process by which the parties
    could terminate the Agreement. The Doctors had the right to
    terminate the Agreement under certain circumstances,
    including EpiCept’s failure “to use commercially and
    scientifically reasonable efforts to” pursue an Investigational
    New Drug Application or a New Drug Application with the
    United States Food and Drug Administration (FDA) within
    specified time frames. Section 10 further provided that “[i]n
    the event of any material breach or default . . . by a party . . .
    the other party . . . shall give the Defaulting Party written
    notice of the default and its election to terminate this
    Agreement at the expiration of a cure period of ninety (90)
    days from the date of the notice.” If the Doctors “duly
    terminate[d]” the Agreement, EpiCept was to return the
    patents to them.
    At some point prior to entering the Agreement, Dr. Flores
    used NP-2 to treat “a few” first- and second-degree burns at
    his clinic. The Doctors never disclosed this use to EpiCept.
    Between December 2000 and October 2001, EpiCept
    conducted various studies on NP-2 and corresponded with the
    FDA regarding the drug’s potential for approval. EpiCept
    ultimately decided to postpone direct development of NP-2 in
    October 2001, but waited until November 2002 to give notice
    CROWLEY V. EPICEPT CORP.                          7
    of this decision to the Doctors. The parties corresponded
    over the next several years regarding the status of NP-2’s
    development. On May 18, 2004, the Doctors demanded a
    cure under § 10 of the Agreement because EpiCept had done
    no work on NP-2 since late 2001. In April 2006, the Doctors
    terminated the Agreement and demanded reassignment of the
    patents.
    B.
    Over two and a half years later, in December 2008, the
    Doctors filed suit alleging claims for breach of contract,
    breach of implied covenant of good faith and fair dealing,
    fraud, and rescission.1 On January 26, 2012, the district court
    granted EpiCept’s motion for summary judgment. 
    2012 WL 253153
    (S.D. Cal. Jan. 26, 2012). The district court excised
    the definition of “Improvement” from the Agreement because
    it “produce[d] an absurd outcome,” and concluded that term
    “reasonably means and includes any modification of the
    patents that is invented, conceived and/or reduced to practice
    by [the Doctors].” 
    Id. at *7–8.
    The Doctors appealed this
    decision, and we found that the district court erred by
    excising and re-defining “[I]mprovement” because “[a]n
    ‘improvement’ that updates a component of the technology
    used in a method patent . . . could be both a modification and
    an infringement.” Crowley v. EpiCept Corp., 547 F. App’x
    844, 846 (9th Cir. 2013) (citing Energy Transp. Grp., Inc. v.
    William Demant Holding A/S, 
    697 F.3d 1342
    , 1352 (Fed. Cir.
    2012)).
    1
    The case was originally filed in the District of New Jersey, but
    eventually made its way to the Southern District of California.
    8                   CROWLEY V. EPICEPT CORP.
    Questions of fact therefore remained as to whether Dr.
    Flores’s use of NP-2 to treat burns constituted an
    infringement and, if so, whether the Doctors’ failure to
    disclose this use constituted a material breach. We explained:
    “[E]ven if Plaintiffs’ failure to report this use of the ointment
    was a breach, it must have been a material breach—one that
    ‘defeat[s] the purpose of the contract,’—to excuse Defendant
    from the performance of its duties.” 
    Id. (internal citations
    omitted).
    On remand, the Doctors continued to advance their
    breach-of-contract theory. EpiCept’s primary theory of the
    case was that the Doctors could not demonstrate the second
    element of a contract claim under New Jersey law—that they
    “did what the contract required [them] to do”—because
    (a) Dr. Flores used the NP-2 ointment on patients suffering
    from first- and second-degree burns, (b) the use constituted an
    improvement under the Agreement, (c) the Doctors failed to
    timely notify EpiCept of an improvement, violating § 2.1 of
    the Agreement, and (d) this conduct constituted a material
    breach.
    As the case progressed towards trial, the Doctors sought
    to have Chris Pedersen, a business appraiser, opine as to a
    number of issues, particularly on the value of a drug patent.
    Following a Daubert 2 hearing, the district court excluded
    Pedersen’s opinion testimony because it was unreliable.
    Specifically, the court determined that Pederson’s “testimony
    regarding FDA approval is either based on pure conjecture,
    or simply a parroting of what Dr. Flores told him,” and was
    not based on sufficient facts or data because Pederson
    “refused to look for any statistics to estimate the risk that the
    2
    Daubert v. Merrell Dow Pharm., Inc., 
    509 U.S. 579
    (1993).
    CROWLEY V. EPICEPT CORP.                      9
    FDA would not approve NP-2, because he [thought] that
    investors do not consider such things. Instead, he simply
    assumed that there was no risk.”
    The trial finally began on March 12, 2015, and the
    “material breach” issue continued to feature prominently. On
    the fifth day of trial, EpiCept moved for judgment as a matter
    of law pursuant to Federal Rule of Civil Procedure 50.
    EpiCept argued, among other things, that the undisputed
    evidence established that the Doctors were required to
    disclose any improvements in writing and had failed to
    disclose Dr. Flores’s use of NP-2 to treat burn patients, which
    constituted a material breach of the contract. The Doctors
    responded that, pursuant to the Ninth Circuit’s ruling on the
    summary judgment order, the jury should decide whether the
    Doctors’ failure to disclose this use of NP-2 was a “material”
    breach. In hearing argument on EpiCept’s Rule 50 motion,
    the district court inquired whether there was any evidence
    that the Doctors had complied with the Agreement’s 90-day
    cure provision, but the court’s order denying EpiCept’s
    motion neither addressed the Doctors’ compliance with the
    90-day cure period nor recognized that issue as a basis for
    EpiCept’s Rule 50 motion.
    The trial continued, with the parties sparring over the jury
    instructions on material breach, waiver, and adoptive
    admissions. The Doctors agreed to the jury instruction
    entitled “Plaintiffs Failure to Do What the Contract
    Required,” but later argued that the “Claims of Breach”
    instruction should be modified to make clear that “material
    breach” applied to both the Doctors and EpiCept. The
    Doctors argued this change was necessary to ensure the jury
    understood that Dr. Flores’s treatment of burns with NP-2
    could only defeat the Doctors’ breach of contract claim—as
    10                 CROWLEY V. EPICEPT CORP.
    set forth in the “Elements of Contract Claim” instruction—if
    that conduct constituted a “material” breach.3 The court
    rejected the Doctors’ arguments. It found that the “Claims of
    Breach” instruction was adequately mutual, and that the
    Doctors could explain to the jury in closing arguments that if
    the jury found that Dr. Flores’s treatment of burns was not a
    “material” breach, then the Doctors satisfied the second
    element of their breach of contract claim, as set forth in the
    “Elements of Contract Claim” instruction.
    The Doctors also insisted that the jury should be
    instructed regarding adoptive admissions, thereby permitting
    the jury to find that, by failing to respond to the Doctors’
    written communications accusing them of breach, EpiCept
    admitted that it had breached the Agreement. The Doctors
    further asserted that the verdict form should reflect that the
    jury could find that EpiCept had waived the Doctors’
    compliance with the 90-day cure provision.
    In response to these and other arguments, the court gave
    the jury instructions entitled “Elements of Contract Claim,”
    “Claims of Breach,” and “Plaintiffs Failure to Do What
    Contract Requires.” The “Plaintiffs’ Failure to Do What
    Contract Requires” instruction provides, in full:
    EpiCept claims that Plaintiffs cannot establish
    a breach of contract because Plaintiffs failed
    to do what the contract required of them.
    Specifically, EpiCept claims the contract
    3
    The Doctors’ counsel argued that “there’s no way any reasonable
    person could argue that . . . treatment of the burns was such a substantial
    breach of the contract it excused all of [EpiCept’s] conduct.”
    CROWLEY V. EPICEPT CORP.                    11
    obligated Plaintiffs to disclose, in writing,
    their treatment of burn patients with NP2.
    To decide this issue, you must determine
    whether:
    1. Dr. Flores’ use of NP2 was at all times
    covered by the ‘961 patent;
    2. The ‘961 patent makes no mention of
    treating burn patients;
    3. Plaintiffs failed to disclose the treatment of
    burn victims with NP2 in writing to EpiCept;
    and
    4. The failure to disclose the treatment of burn
    victims with NP2 in writing to EpiCept was
    material. A failure to disclose is material if it
    defeats the purpose of the contract.
    If you answered yes to all four issues, then
    you must find that Plaintiffs cannot prevail on
    their breach of contract claim.
    The “Claims of Breach” instruction provides:
    One of the elements that the plaintiffs must
    prove is defendant’s breach of contract.
    Failure to perform a contract in accordance
    with its terms constitutes a breach of contract.
    It does not matter if the failure was purposeful
    or inadvertent. The plaintiffs claim the
    12           CROWLEY V. EPICEPT CORP.
    defendant breached the contract in the
    following manner:
    EpiCept stopped its effort to obtain FDA
    approval of plaintiffs’ drug and failed to
    return the patents after plaintiffs demanded
    their return.
    The defendant denies this. EpiCept contends
    that it never had an obligation to return the
    patents because its efforts to obtain FDA
    approval were commercially and scientifically
    reasonable and Plaintiffs failed to perform its
    obligations under the contract.
    A breach may be material or minor. Plaintiff
    can sue for any breach, even if minor
    providing the breach causes the plaintiff
    measurable injury or damage. When there has
    been a minor breach that may have caused the
    plaintiff injury or damage, it is possible for
    you to conclude that the defendant has
    nevertheless substantially performed the
    contract.
    To find that the defendant substantially
    performed the contract, you would have to
    conclude from the evidence that the defendant
    made a good faith effort that actually achieved
    the essential purpose of the contract and
    provide[d] the plaintiff with the fundamental
    benefits that plaintiff was supposed to receive
    from the contract.
    CROWLEY V. EPICEPT CORP.                   13
    Now, let me explain what happens if you
    conclude the breach was not minor but was
    material. A breach is material if it affects the
    purpose of the contract in an important or
    vital way. A material breach defeats the
    purpose of the contract and is inconsistent
    with the intention of the parties to be bound
    by the contract terms. When a defendant
    materially breaches a contract, the plaintiff
    has a right to terminate the contract and may
    be excused from further performance of
    plaintiff’s remaining obligations under the
    contract. When the plaintiff’s promise under
    the contract was dependent upon the
    defendant’s performance and the defendant
    fails to perform, then the plaintiff is excused
    from his/her further performance of his/her
    promise.
    When a party materially breaches the contract
    but does not indicate any intention to
    renounce or repudiate the remainder of the
    contract, the plaintiff can elect to either
    continue to perform or cease to perform. If
    the plaintiff elects to perform, plaintiff is
    deprived of an excuse for ceasing
    performance. But even if the plaintiff elects
    to perform, plaintiff can still sue for any
    injury or damages suffered because of the
    material breach.
    The court further instructed the jury that it could only
    consider EpiCept’s failure to respond to the Doctors’ written
    communication to EpiCept, which stated that EpiCept was in
    14               CROWLEY V. EPICEPT CORP.
    breach of the contract, if conditions were satisfied so that
    EpiCept’s failure to respond constituted an adoptive
    admission. The jury was also instructed regarding EpiCept’s
    affirmative defense that the Doctors had waived their right to
    insist on return of the patents.
    Shortly after it was instructed and retired to deliberate, the
    jury asked by note: “Was the burn treatment (patient) before
    or after the agreement was entered? Does it matter?
    Specifically to plaintiffs [sic] failure to do what contract
    required.” The court answered:
    In response to your question . . . these are
    factual questions that must be determined by
    the jury . . . . You must determine the facts in
    this case based on the evidence presented.
    The jury should review the contractual
    provisions in addition to all of the other jury
    instructions . . . in arriving at a verdict.
    The jury returned a verdict for EpiCept on all counts of the
    complaint. The Doctors moved for a new trial under Rule 59,
    arguing, among other things, that the instructions failed to
    clarify “that the concept of material breach was equally
    applicable to the [the Doctors] as to any condition [with
    which] they were required to comply.” The court denied the
    motion, and entered judgment in the EpiCept’s favor.
    The Doctors appealed. We have jurisdiction pursuant to
    28 U.S.C. § 1291.
    CROWLEY V. EPICEPT CORP.                     15
    II. DISCUSSION
    A.
    The Doctors make a number of arguments related to the
    jury instructions. First, they contend that the jury instructions
    were erroneous because they did not require the jury to decide
    whether Dr. Flores’s use of NP-2 to treat burns was an
    “improvement” under the Agreement. Second, the Doctors
    argue that the jury was not adequately instructed that the
    Doctors’ own breach could only defeat their breach of
    contract claim if their breach was material. Finally, the
    Doctors challenge the instructions, or lack thereof, dealing
    with EpiCept’s late-raised argument that the Doctors were not
    entitled to return of their patents because they failed to
    comply with the Agreement’s 90-day notice-to-cure
    requirement. They contend not only that the district court
    erred in giving the instructions as it did, but that the district
    court abused its discretion in denying the Doctors’ motion for
    a new trial on this basis.
    “When a party raises a contemporaneous objection to a
    jury instruction, we review the jury instruction either de novo
    or for abuse of discretion, depending on the nature of the
    error.” Chess v. Dovey, 
    790 F.3d 961
    , 970 (9th Cir. 2015).
    “We review a district court’s formulation of civil jury
    instructions for an abuse of discretion, but we consider de
    novo whether the challenged instruction correctly states the
    law.” Wilkerson v. Wheeler, 
    772 F.3d 834
    , 838 (9th Cir.
    2014). Similarly, a new trial may be warranted if the district
    court has given “erroneous jury instructions” or failed “to
    give adequate instructions.” Murphy v. City of Long Beach,
    
    914 F.2d 183
    , 187 (9th Cir. 1990). We review the district
    16              CROWLEY V. EPICEPT CORP.
    court’s denial of a motion for a new trial for an abuse of
    discretion. 
    Id. at 186.
    Challenges to jury instructions may be waived, however.
    A “party forfeits a right when it fails to make a timely
    assertion of that right and waives a right when it is
    intentionally relinquished or abandoned.” United States v.
    Kaplan, 
    836 F.3d 1199
    , 1216 (9th Cir. 2016), cert. denied,
    
    137 S. Ct. 1392
    (2017) (citing United States v. Olano,
    
    507 U.S. 725
    , 733 (1993)). “Waiver of a jury instruction
    occurs when a party considers ‘the controlling law, or omitted
    element, and, in spite of being aware of the applicable law,
    proposed or accepted a flawed instruction.’” 
    Id. at 1217
    (quoting United States v. Perez, 
    116 F.3d 840
    , 845 (9th Cir.
    1997) (en banc)). “Forfeited rights are reviewable for plain
    error, while waived rights are not.” 
    Perez, 116 F.3d at 845
    ;
    see also C.B. v. City of Sonora, 
    769 F.3d 1005
    , 1017–18 (9th
    Cir. 2014) (discussing plain error standard in civil context).
    1.
    The Doctors waived their argument that the jury
    instructions were faulty because they did not require the jury
    “to decide as a preliminary issue whether Dr. Flores’ use of
    the ointment, on a few patients for burns, prior to the contract
    constituted an improvement under the Agreement.” The
    Doctors have likewise waived their argument that the district
    court “should not have permitted the instruction at all . . .
    [because] there was no testimony presented as to what
    constituted an infringement of the Patent, and when home
    use, authorized by the contract, would be considered an
    improvement.” EpiCept and the Doctors, after a jury
    instruction conference, explicitly agreed to use the instruction
    “Plaintiffs’ Failure To Do What Contract Required,” and
    CROWLEY V. EPICEPT CORP.                   17
    agreed that this instruction should omit the law regarding
    patent infringement. This instruction explained infringement,
    improvement, and materiality in a manner requested and
    agreed to by the Doctors. The Doctors intentionally
    abandoned any argument that the jury was not adequately
    instructed regarding improvement or infringement of the
    patents, or that the evidence did not permit this instruction.
    See 
    Kaplan, 836 F.3d at 1216
    (citing 
    Olano, 507 U.S. at 733
    ).
    2.
    For different reasons, we also find unavailing the
    Doctors’ argument that the jury was not adequately instructed
    that any breach by the Doctors amounting to a “failure to do
    what the contract required” must have been a material breach.
    The instructions relevant to this issue were entitled
    “Plaintiffs’ Failure to Do What Contract Required,” “Claims
    of Breach,” and “Elements of Contract Claim.” After
    agreeing on these instructions, the Doctors raised “a
    mutuality issue.” They argued that because the “Plaintiffs’
    Failure To Do What Contract Required” instruction did not
    include a more detailed explication of materiality, and
    because the “Claims of Breach” instruction defined
    “materiality” only in terms of a defendant’s breach, the
    instructions on this issue were inadequate. The Doctors
    argued that the “Claims of Breach” instruction should be
    modified to make clear that “material breach,” as defined in
    that instruction, applied to both the Doctors and EpiCept.
    The Doctors’ challenge to these instructions presents an
    issue of formulation or wording, which we review for an
    18                 CROWLEY V. EPICEPT CORP.
    abuse of discretion.4 
    Wilkerson, 772 F.3d at 838
    . The third
    and fourth elements listed in the “Plaintiffs Failure to Do
    What Contract Required” instruction make clear that for
    EpiCept to succeed on its theory that the Doctors’ breach of
    contract claim failed because the Doctors had not disclosed
    their use of NP-2 to treat burns, EpiCept needed to prove that
    the failure to disclose was material. This instruction clearly
    told the jury that:
    EpiCept claims that Plaintiffs cannot establish
    a breach of contract because plaintiffs failed
    to do what the contract required of them.
    Specifically, EpiCept claims that the contract
    obligated Plaintiffs to disclose, in writing,
    their treatment of burn patients with NP-2. To
    decide this issue, you must decide whether:
    . . . the failure to disclose the treatment of
    burn victims of NP-2 in writing to EpiCept
    was material. A failure to disclose is material
    if it defeats the purpose of the contract.
    The “Claims of Breach” instruction explains “material
    breach” both in terms of a “Defendant’s” breach, and in
    general terms. For example, that instruction states: “A breach
    is material if it affects the purpose of the contract in an
    important or vital way. A material breach defeats the purpose
    4
    Even if the Doctors challenged the jury instructions as an incorrect
    statement of the law, requiring us to review the challenged instructions de
    novo, 
    Wilkerson, 772 F.3d at 838
    , we would affirm. The instructions did
    not misstate New Jersey’s law regarding material breach, or fail to
    adequately inform the jury of it. Cf. Magnet Res., Inc. v. Summit MRI,
    Inc., 
    723 A.2d 976
    , 981 (N.J. Super. Ct. App. Div. 1998); Medivox Prods.,
    Inc. v. Hoffman-La Roche, Inc., 
    256 A.2d 803
    , 809 (N.J. Super. Ct. Law
    Div. 1969).
    CROWLEY V. EPICEPT CORP.                     19
    of the contract and is inconsistent with the intention of the
    parties to be bound by the contract terms.” The Doctors had
    every opportunity during closing arguments to argue that the
    jury should consider the definition of materiality in more
    detail, and the district court reminded them of their
    opportunity to do so.
    We therefore hold that the district court did not abuse its
    discretion in formulating the jury instructions or in denying
    the Doctors’ requested modification. The challenged
    instructions correctly state the law, and the jury was clearly
    and adequately informed that only a material breach by the
    Doctors could defeat their breach of contract claim against
    EpiCept. Accordingly, the district court did not abuse its
    discretion in denying the Doctors’ request for a new trial on
    this ground.
    3.
    The dissent takes issue with these instructions, but for
    reasons not advanced by the Doctors. The Doctors do not
    argue that the definition of materiality was “wholly
    inadequate.” Nor do the Doctors argue that the definition of
    material breach—defeating the purpose of the contract—is
    incorrect as a matter of New Jersey law. They do not take
    issue with the fact that the instructions did not include the
    factors from the Second Restatement mentioned in the third
    footnote in the New Jersey Model Instructions. The Doctors
    had the obligation to raise these issues if they wanted the trial
    court to consider them, and they failed to do so. Nor do they
    raise these issues on appeal. We have noted:
    There are . . . important reasons for holding
    that an appellant waives an issue if it fails to
    20              CROWLEY V. EPICEPT CORP.
    provide argument about the issue in its
    opening brief. Rules are enforced to deter the
    type of improper, or inattentive, conduct that
    occurred here. Moreover, “appellate courts do
    not sit as self-directed boards of legal inquiry
    and research, but essentially as arbiters of
    legal questions presented and argued by the
    parties before them.”
    Brown v. Rawson-Neal Psychiatric Hosp., 
    840 F.3d 1146
    ,
    1149 (9th Cir. 2016) (quoting United States v. Mageno,
    
    762 F.3d 933
    , 954–55 (9th Cir. 2014) (Wallace, J.,
    dissenting)).
    4.
    Finally, we reject the Doctors’ challenge to the jury
    instructions, or lack thereof, relating to EpiCept’s position at
    trial that even if it had breached the Agreement, the Doctors
    were not entitled to return of their patents as a remedy
    because the Doctors had not complied with the Agreement’s
    90-day notice-to-cure provision. The Doctors contend that
    the district court erred by not including their proposed special
    instructions on waiver, adoptive admissions, and materiality
    in connection with this issue. But EpiCept prevailed on the
    basis that the Doctors materially breached the contract by
    failing to disclose Dr. Flores’s use of NP-2 on burns. Thus,
    even assuming that the jury was not properly instructed
    regarding the legal import of EpiCept’s failure to respond to
    the Doctors’ written communications or the Doctors’
    compliance with the 90-day notice-to-cure provision, those
    errors were harmless. See Cheffins v. Stewart, 
    825 F.3d 588
    ,
    596 (9th Cir. 2016).
    CROWLEY V. EPICEPT CORP.                     21
    B.
    In addition, the Doctors challenge the district court’s
    response to the question posed by the jury during
    deliberations, which they characterize as “nearly non-
    responsive and cursory.” The jury queried: “Was the burn
    treatment (patient) before or after the agreement was entered?
    Does it matter? Specifically to plaintiffs [sic] failure to do
    what contract required.” The jury thus asked the court to
    resolve a factual issue—whether the Doctors’ breach was
    material—that the jury was charged with deciding. The court
    properly responded by referring the jury both the evidence
    presented at trial and the instructions the court previously
    gave.
    “The Supreme Court has clearly stated that it is reversible
    error for a trial judge to give an answer to a jury’s question
    that is misleading, unresponsive, or legally incorrect.” United
    States v. Anekwu, 
    695 F.3d 967
    , 986 (9th Cir. 2012) (quoting
    United States v. Frega, 
    179 F.3d 793
    , 810 (9th Cir. 1999)).
    “When a jury makes explicit its difficulties a trial judge
    should clear them away with concrete accuracy.” 
    Id. (quoting Frega,
    179 F.3d at 809). But we have also recognized that “a
    trial judge . . . enjoys wide discretion in the matter of
    charging the jury,” and that “discretion carries over to a trial
    judge’s response to a question from the jury.” Arizona v.
    Johnson, 
    351 F.3d 988
    , 994 (9th Cir. 2003) (citations and
    internal quotations omitted). “Because the jury may not
    enlist the court as its partner in the factfinding process, the
    trial judge must proceed circumspectly in responding to
    inquiries from the jury . . . .” 
    Id. (quoting United
    States v.
    Walker, 
    575 F.2d 209
    , 214 (9th Cir. 1978)). Often the most
    prudent approach, under such circumstances, is to “fram[e]
    responses in terms of supplemental instructions rather than
    22               CROWLEY V. EPICEPT CORP.
    following precisely the form of question asked by the jury.”
    
    Id. (quoting Walker
    , 575 F.2d at 214). When the jury’s
    question does not indicate that “the jurors were affirmatively
    interpreting the law incorrectly,” 
    Anekwu, 695 F.3d at 987
    ,
    and the court’s original instructions provide a correct
    statement of the law and “generally address[] the jury’s
    question,” a district court acts “within its discretion by simply
    referring the jury to the instructions they had already been
    given,” 
    Johnson, 351 F.3d at 995
    (citing United States v.
    McCall, 
    592 F.2d 1066
    , 1068–69 (9th Cir. 1979); United
    States v. Collom, 
    614 F.2d 624
    , 631 (9th Cir. 1979); Wilson
    v. United States, 
    422 F.2d 1303
    , 1303–04 (9th Cir. 1970);
    Davis v. Greer, 
    675 F.2d 141
    , 145–46 (7th Cir. 1982)).
    Here, the district court’s original instructions to the jury
    were adequate and accurately stated New Jersey law, and the
    jury’s question does not indicate that the jury was interpreting
    the law incorrectly. Rather, the question indicated that the
    jury sought to enlist the judge as its partner in determining
    and interpreting the facts. The district court did not abuse its
    discretion when it refused to invade the province of the jury,
    and instead referred the jury back to the instructions already
    given and the evidence presented at trial.
    C.
    The Doctors raise two challenges to the verdict’s
    evidentiary basis. First, they contend that there was
    insufficient evidence to support the verdict, and second, they
    argue that the district court abused its discretion in finding
    that the verdict was not contrary to the clear weight of the
    evidence. Before the district court, the Doctors brought a
    motion for a new trial under Federal Rule of Civil Procedure
    59, but did not file a motion for judgment as a matter of law
    CROWLEY V. EPICEPT CORP.                    23
    under Federal Rule of Civil Procedure 50(a) or (b). “[A]
    post-verdict motion under Rule 50(b) is an absolute
    prerequisite to any appeal based on insufficiency of the
    evidence.” Nitco Holding Corp. v. Boujikian, 
    491 F.3d 1086
    ,
    1089 (9th Cir. 2007) (citing Unitherm Food Sys., Inc. v.
    Swift-Eckrich, Inc., 
    546 U.S. 394
    (2006)). The Doctors
    waived their right to directly challenge the sufficiency of the
    evidence by failing to make the appropriate Rule 50 motions.
    See 
    id. We thus
    assess only the trial court’s denial of the
    Doctors’ motion for a new trial under Rule 59.
    Under Rule 59, a court may grant a new trial “for any
    reason for which a new trial has heretofore been granted in an
    action at law in federal court.” Fed. R. Civ. P. 59(a)(1)(A).
    Such reasons may include a “verdict [that] is contrary to the
    clear weight of the evidence,” a verdict “based upon false or
    perjurious evidence,” or “to prevent a miscarriage of justice.”
    Passantino v. Johnson & Johnson Consumer Prods., Inc.,
    
    212 F.3d 493
    , 510 n.15 (9th Cir. 2000) (citations omitted).
    We review the trial court’s determination that the verdict was
    not against the clear weight of the evidence for an abuse of
    discretion. Kode v. Carlson, 
    596 F.3d 608
    , 612 (9th Cir.
    2010). The district court’s denial of a Rule 59 motion on this
    basis is “virtually unassailable. In such cases, we reverse for
    a clear abuse of discretion only where there is an absolute
    absence of evidence to support the jury’s verdict.” 
    Id. (emphasis in
    original) (quoting Desrosiers v. Flight Int’l of
    Fla., Inc., 
    156 F.3d 952
    , 957 (9th Cir. 1998)).
    New Jersey law provides that a party to a contract “may
    be considered to have committed a material breach” when,
    “during the course of performance,” he “fails to perform
    []essential obligations under the contract . . . .” Medivox
    Prods., Inc. v. Hoffmann-La Roche, Inc., 
    256 A.2d 803
    , 809
    24               CROWLEY V. EPICEPT CORP.
    (N.J. Super. Ct. Law Div. 1969). And, it provides, “[w]here
    a contract calls for a series of acts over a long time, a material
    breach may arise upon a single occurrence or consistent
    recurrences which tend to ‘defeat the purpose of the
    contract.’” 
    Id. (quoting Winfield
    Mut. Housing Corp. v.
    Middlesex Concrete Prods. & Excavating Corp., 
    120 A.2d 655
    (N.J. Super. Ct. App. Div. 1956)).
    The district court concluded that EpiCept presented
    sufficient evidence, through the testimony of the Doctors and
    Peter Golikov, that Dr. Flores’s treatment of burn victims was
    a material breach of the Agreement under New Jersey law.
    This conclusion was by no means an abuse of discretion. The
    two witnesses who negotiated the contract both testified that
    the clause requiring the Doctors to inform EpiCept of
    improvements to the patents practiced by the Doctors was
    important. Dr. Crowley testified that “the goal of EpiCept
    was to control all of the world patent rights on topical
    Ketamine, and with that portfolio, they would be much more
    successful than someone who didn’t own all the intellectual
    property rights. They didn’t have to worry about assignment
    issues, infringement issues, none of that.” He also testified
    that he understood that “EpiCept was buying not only the two
    patents but also all improvements thereto . . . .” Dr. Flores
    testified that he used the patented formula to treat burn
    patients, and Dr. Crowley confirmed that Dr. Flores’s use of
    NP-2 to treat burn pain was an “improvement” of the patent.
    Dr. Crowley testified that he “understood that providing the
    information to EpiCept about improvements was important to
    EpiCept because it could either help them get through the
    FDA process or potentially apply for a new indication with
    the FDA . . . .” Nonetheless, all three witnesses confirmed
    that disclosure was never made.
    CROWLEY V. EPICEPT CORP.                   25
    Golikov, the President and COO of EpiCept who
    negotiated the contract on EpiCept’s behalf, testified that:
    The purpose of the improvements clause in
    any agreement is to sort of have some
    confidence that after you pay all this money
    for a particular patent that there isn’t
    something around the corner that is slightly
    better. So, you know, it’s a way of making a
    fair deal for the licensor and licensee to
    understand that what they’re getting is what
    they’re getting, and there’s not something
    better that they don’t know about, or if there
    is something better 10 days later, then for all
    that compensation, you would get rights to it.
    He further testified that he would want to know about
    improvements that were practiced “because it could
    potentially affect the patient population in human trials. It
    could be a better or worse population. We certainly would
    like to know . . . .” Finally, he testified that EpiCept would
    not have signed the contract if that particular clause was not
    included.
    The dissent, however, suggests that this evidence
    regarding the purported “improvement” is not persuasive.
    But whether a breach is material is a question for the jury to
    decide, Magnet 
    Res., 723 A.2d at 982
    , not an appellate court,
    and at trial the Doctors themselves recognized that the
    evidence on this issue went both ways, such that it was
    appropriate for the jury to decide the question. Because it
    cannot be said that there was an “absolute absence of
    evidence to support the jury’s verdict,” 
    Kode, 596 F.3d at 26
                  CROWLEY V. EPICEPT CORP.
    612, we find that the district court did not abuse its discretion
    in denying the Doctors’ motion for a new trial.
    D.
    The Doctors finally challenge the district court’s
    exclusion of their expert witness, who was to testify regarding
    the Doctors’ damages. “We review a district court’s
    evidentiary rulings, such as its decisions to exclude expert
    testimony . . . for an abuse of discretion, and a showing of
    prejudice is required for reversal.” Ollier v. Sweetwater
    Union High Sch. Dist., 
    768 F.3d 843
    , 859 (9th Cir. 2014).
    Pederson was originally to offer opinions not only on whether
    the Doctors sustained damages, but on whether EpiCept
    breached its contractual obligations to the Doctors, whether
    EpiCept’s efforts were commercially reasonable, and whether
    the Doctors could have mitigated their damages. After
    EpiCept moved to exclude Pederson’s testimony in its
    entirety, the trial court concluded that the Doctors opposed
    only Pederson’s exclusion as a damages expert. The district
    court thus deemed the Doctors “to have admitted that Mr.
    Pederson” was not qualified to opine on other topics in this
    litigation. It is not clear whether the Doctors contend, on
    appeal, that the district court erred in excluding Pederson’s
    testimony in its entirety, or only on the issue of damages.
    However, even assuming that the district court erred in
    excluding Pederson from testifying on all of the topics
    included in his expert report, that error was harmless in light
    of our affirmance of the jury’s verdict finding EpiCept not
    liable. The Doctors do not argue, and the record does not
    reflect, that any of Pederson’s proposed testimony would
    have any impact on the jury’s determination that the Doctors
    failed to do what the contract required them to do.
    CROWLEY V. EPICEPT CORP.                           27
    III. CONCLUSION
    For the foregoing reasons, we AFFIRM.
    WARDLAW, Circuit Judge, dissenting in part:
    EpiCept’s claim that Plaintiffs materially breached the
    parties’ agreement by using their patent to treat a few burn
    victims was the legal equivalent of a Hail Mary pass. It
    worked—miraculously, one might say. But EpiCept was
    aided by two significant errors on the part of the district court
    which require reversal and a new trial. First, the jury’s
    verdict was not supported by substantial evidence because no
    rational jury could find material breach on the evidence
    presented. Second, the district court inadequately instructed
    the jury on this claim.1 Our failure to correct these errors will
    only increase uncertainty, and by extension bargaining costs,
    for contracting parties.
    A material breach is one that “defeats the purpose of the
    contract,” Magnet Res., Inc. v. Summitt MRI, Inc., 
    723 A.2d 976
    , 981 (N.J. Super. Ct. App. Div. 1998) (internal quotation
    marks omitted), leaving the promisee with “something
    substantially less or different from that for which he or she
    bargained,” 23 Williston on Contracts § 63:3 (4th ed. 2017).2
    1
    I dissent only with respect to the jury instruction and substantial
    evidence issues.
    2
    The Restatement provides the following factors for determining
    whether a breach is material:
    28                CROWLEY V. EPICEPT CORP.
    Whether a breach is material is generally a question of fact
    for the jury. Magnet 
    Res., 723 A.2d at 982
    . However, if this
    question “admits of only one reasonable answer” in a given
    case, “the court should intervene and resolve the matter as a
    question of law.” 23 Williston on Contracts § 63:15 (4th ed.
    2017) (citing Parker v. Byrne, 
    996 A.2d 627
    (R.I. 2010)).
    Here, there is only one reasonable answer: The clear
    weight of the evidence demonstrates Plaintiffs’ breach was
    not material. Indeed, there is no record evidence that Flores’s
    treatment of a few burn patients with the patented formula
    harmed EpiCept at all, much less defeated the purpose of the
    contract. EpiCept concedes that it decided to stop work on
    the NP-2 patent because its time was better spent on drug
    candidates that were further along in development. EpiCept
    (a) the extent to which the injured party will be
    deprived of the benefit which he reasonably
    expected;
    (b) the extent to which the injured party can be
    adequately compensated for the part of that benefit
    of which he will be deprived;
    (c) the extent to which the party failing to perform or
    to offer to perform will suffer forfeiture;
    (d) the likelihood that the party failing to perform or to
    offer to perform will cure his failure, taking
    account of all the circumstances including any
    reasonable assurances;
    (3) the extent to which the behavior of the party failing
    to perform or to offer to perform comports with
    standards of good faith and fair dealing.
    Restatement (Second) Contracts § 241 (Am. Law Inst. 1981).
    CROWLEY V. EPICEPT CORP.                     29
    does not even attempt to argue that its strategy would have
    changed had it known of Flores’s use of the product on burn
    victims. That the majority manages to find a material breach
    where there is not even a claim for damages is strange indeed.
    See, e.g., 23 Williston on Contracts § 63:3 (“In many cases,
    a material breach of contract is proved by the established
    amount of monetary damages flowing from the breach.”)
    The majority incorrectly reasons that the jury’s finding of
    material breach was supported by substantial evidence,
    pointing to testimony that the use of NP-2 constituted an
    “improvement” and testimony that it was an important clause
    in the agreement. And I agree with the majority, that if this
    were the appropriate inquiry, then evidence was undoubtedly
    sufficient to find material breach. However, the question is
    not the significance of the breached provision—an issue
    courts are ill-equipped to determine—but rather the
    significance of the actual breach. We must ask what EpiCept
    actually lost, not what it might have lost. See, e.g.,
    23 Williston on Contracts § 63:3 (“In many cases, a material
    breach of contract is proved by the established amount of
    monetary damages flowing from the breach.”). Accordingly,
    if we ask what EpiCept lost by the Plaintiffs’ failure to
    disclose their use of NP-2 on burns, the answer is “nothing.”
    The majority’s holding that a breach is material any time
    an important contractual term is breached would render
    substantially all breaches material. For example, in a contract
    with a single term, to “build a house with a ruby red roof,”
    painting the roof maroon would be a material breach because
    the term “house with a red roof” is crucially
    important—indeed, it is the only thing the offeror receives
    from the contract. But this is exactly the kind of situation the
    material breach doctrine is designed to avoid. Instead of
    30               CROWLEY V. EPICEPT CORP.
    holding that the offeror has no duty to pay the contractor
    because he painted the roof maroon, a court will simply
    reduce the money owed by the cost of repainting the roof the
    desired color.
    Accordingly, I would find that the verdict was not
    supported by substantial evidence, and that the district court
    therefore abused its discretion in denying Plaintiffs’ Rule 59
    motion for a new trial.
    I would also hold that the district court abused its
    discretion in failing to properly instruct the jury on the issue
    of material breach. The majority blithely asserts that the
    Plaintiffs waived this argument by failing to object to the jury
    instructions at trial. This is a blatant misrepresentation of the
    record. In fact, Plaintiffs vociferously objected. The district
    court refused Plaintiffs’ pleas: “At this point, I leave it the
    way it is. Your objection is highly noted.”
    Each party claimed that the other was in material breach:
    Plaintiffs as part of their prima facie case, EpiCept as an
    affirmative defense. In Plaintiffs’ prima facie case, the
    district court gave the jury a modified version of the New
    Jersey model instruction on breach, including four paragraphs
    explaining the concept of material breach in exhaustive detail.
    But the court inexplicably refused Plaintiffs’ counsel’s
    request for a substantially similar instruction on EpiCept’s
    affirmative defense. Instead, the court offered the following
    instruction, which is amended for clarity:
    To decide [whether EpiCept was excused
    from performance], you must determine
    whether . . . [t]he failure to disclose the
    treatment of burn victims with NP2 in writing
    CROWLEY V. EPICEPT CORP.                         31
    to EpiCept was material. A failure to disclose
    is material if it defeats the purpose of the
    contract.
    This instruction was wholly inadequate. While courts
    may issue customized jury instructions so long as they “fairly
    and adequately cover the issues presented,” United States v.
    Peppers, 
    697 F.3d 1217
    , 1220 (9th Cir. 2012), the district
    court’s instructions did not come close to doing so. Judges
    trained in the law struggle to apply the same definition of
    “material breach” that the court gave the jury.3 This difficulty
    is precisely why the Restatement, which New Jersey’s
    sanctioned jury instruction quotes in full, uses a detailed five-
    factor test, see Restatement (Second) Contracts § 241, and
    why the bulk of the New Jersey model instruction on breach
    is devoted to explaining the concept of material breach—92
    percent by word count. N.J. Model Civ. Jury Instruction
    4.10L (2017).
    New Jersey strongly favors the use of model jury
    instructions, see State v. R.B., 
    183 N.J. 308
    , 325 (2005), and
    there was particular reason for giving the model instruction
    here. The district judge’s statement that jurors would have
    found a more detailed explanation than the one he gave
    “confusing,” does not square with his assent to four
    paragraphs of explanation on the same issue in the instruction
    on Plaintiffs’ prima facie case.
    The majority reasons that the district court’s instructions
    were sufficient because Plaintiffs could have told the jury to
    3
    See Eric G. Andersen, A New Look at Material Breach in the Law
    of Contracts, 21 U.C. Davis L. Rev. 1073, 1091 (1988) (“An ‘essence of
    the contract’ approach to materiality, of course, is [not useful].”)
    32                 CROWLEY V. EPICEPT CORP.
    apply the instruction given on Plaintiffs’ prima facie case to
    EpiCept’s affirmative defense, as well. However, the
    majority cites no authority for the curious proposition that an
    otherwise faulty instruction is acceptable so long as the trial
    court does not prevent the challenging party from arguing the
    issue to the jury. I sincerely doubt any exists. The judge is
    the authority on the jury instructions it gives; the jury
    necessarily gives less credence to the advocates’ descriptions
    of the law, especially where those descriptions appear to
    conflict with the judge’s instructions.
    This case is a good illustration of how little understood
    the concept of material breach is among lawyers and
    judges4—and how important it is to fully instruct lay jurors in
    it. The district court initially granted EpiCept’s motion for
    summary judgment on the ground that Plaintiffs’ breach
    excused EpiCept from performance. A different panel of our
    Court reversed on appeal, correctly pointing out that only
    material breaches excuse a counterparty’s performance.
    Crowley v. EpiCept Corp., No. 12-55376, 547 F. App’x 844,
    846 (9th Cir. Dec. 3, 2013) (unpublished). On remand, the
    district court again demonstrated its failure to appreciate the
    nuances of the doctrine. The disagreement among the judges
    4
    See William J. Geller, The Problem of Withholding in Response to
    Breach: A Proposal to Minimize Risk in Continuing Contracts,
    62 Fordham L. Rev. 163, 192 (1993) (“Courts have been accused of
    determining the materiality of breach without any coherence, rationality,
    or justification.”); Amy B. Cohen, Reviving Jacob and Youngs, Inc. v.
    Kent: Material Breach Doctrine Reconsidered, 42 Vill. L. Rev. 65, 67
    (1997) (“The problem with the current application of material breach
    doctrine is in large part a result of an absence of focus. The courts apply
    the test without articulating any foundation or context on which it is
    based.”)
    CROWLEY V. EPICEPT CORP.                            33
    on this panel is only further evidence of the concept’s
    difficulty.
    This is not a purely academic concern. The confusion
    engendered by decisions like ours today has real-world
    effects. Uncertainty about when courts will find a material
    breach increases the cost of private transactions, which in turn
    decreases economic welfare. The majority’s disposition only
    adds to this uncertainty, and perpetuates an injustice.5
    I respectfully dissent.
    5
    Because the jury found that Plaintiffs materially breached the
    contract, it did not reach Plaintiffs’ argument that EpiCept was in breach.
    Had Plaintiffs prevailed on this argument, they may have been entitled to
    compensatory damages and/or the return of their patents.