DocketNumber: Civ. A. No. 3085-49
Citation Numbers: 95 F. Supp. 731
Judges: Pine
Filed Date: 2/12/1951
Status: Precedential
Modified Date: 11/26/2022
This is an action under § 4915 R.S., 35 U.S.C. § 63, seeking an adjudication that plaintiff is entitled to a patent on a high wet strength paper and the method of making it. The process consists in subjecting a cellulose paper web to the action of silicon tetrachloride or some other inorganic halide of silicon or titanium in order to increase its wet strength. The basic reference is a patent to Callinan, No. 2394040, which teaches the treatment of an asbestos web with the same materials and for the same purpose. The sole issue is whether plaintiff, in following the teaching of Cal-linan in the treatment of cellulosic material, has accomplished more than should have been expected of a skilled mechanic, assuming that he was acquainted with the prior art.
Plaintiff points out that asbestos is inorganic and cellulose is organic, and, as shown by the evidence, the reaction of silicon tetrachloride with asbestos is different from that with cellulose. But this is far from an answer to the problem of whether it was obvious to a skilled worker to do what plaintiff has done. On that point it is proper to consider the equivalence in use of asbestos and cellulose, and in that connection the evidence discloses they have many uses in common, e. g., for electrical and heat insulation, gloves, aprons, etc. That their equivalence is recognized in the
' For these reasons I am of the opinion that there was no invention in applying Cal-linan’s process for increasing the wet strength of asbestos web to a cellulose web for the same purpose.
Counsel will submit findings of fact and conclusions of law and judgment.
. Sinclair & Carroll Co. v. Interchemical Co., 325 U.S. 327, 330, 65 S.Ct. 1143, 89 L.Ed. 1644; Potts v. Coe, 79 U.S. App.D.C. 223, 224, 145 F.2d 27; Thompson v. Coe, 78 U.S.App.D.C. 174, 138 F.2d 284; Murphy v. Coe, 69 App.D.C. 225, 99 F.2d 994.
. In re Switzer, 166 F.2d 827, 35 C.C.P.A., Patents, 1013; Kissock v. Duquesne Steel Foundry Co., 3 Cir., 37 F.2d 249.
. Naamlooze Venootschafs v. Coe, 76 U.S. App.D.C. 313, 132 F.2d 573; Krause v. Coe, 74 App.D.C. 47, 120 F.2d 717.