Dreyfus v. Lilienfeld

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 having been filed in the United States Patent Office August 5, 1920. Lilienfeld’s applications were all subsequent to that date. The Lilienfeld…