Dreyfus v. Lilienfeld

An interference was declared on August 19, 1924, by the United States Patent Office between a patent, No. 1451330, granted to Henry Dreyfus, on April 10, 1923, on an application filed August 5, 1920, and an application of the party Leon Lilienfeld, Serial No. 695854, which was filed February 28, 1924.

The subject matter of said interference was set out in six counts, which are as follows:

Count 1. Process for the manufacture of cellulose derivatives, being aralkyl ethers of cellulose, comprising treatment of a cellulosic body with an aral-kylating agent in presence of a base.

Count 2. Process…