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DREYFUS v. LILIENFELD

Patent Appeal Nos. 2771, 2774.

49 F.2d 1055 (1931)

DREYFUS v. LILIENFELD. LILIENFELD v. DREYFUS.

Court of Customs and Patent Appeals.

June 5, 1931.

Attorney(s) appearing for the Case

Baldwin & Wight, of Washington, D. C. (Lloyd B. Wight, of Washington, D. C., and Chas. W. Levinson, of New York City, of counsel), for Dreyfus.

Charles L. Sturtevant and Arthur B. Foster, both of Washington, D. C., Newton M. Perrins and Daniel I. Mayne, both of Rochester, N. Y., for Lilienfeld.

Before GRAHAM, Presiding Judge, and BLAND, HATFIELD, GARRETT, and LENROOT, Associate Judges.

GARRETT, Associate Judge.

In this appeal and cross-appeal are involved 41 counts of an interference, declared in the Patent Office, between a Lilienfeld patent and certain Lilienfeld applications on the one hand, and a Dreyfus application on the other. All are process counts. Certain of them relate to a method of producing alkali cellulose; others to a method or methods of etherifying cellulose, or manufacturing cellulose ethers. Dreyfus is the senior party; his application...

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