Union Carbide & Carbon Corp. v. Stuart Laboratories, Inc.

STALEY, Circuit Judge.

This is an action commenced by Union Carbide and Carbon Corporation 1 against Stuart Laboratories and William B. Hugle, 2 alleging infringement of its U.S. Patent' No. 2,488,507 for “Synthetic Star Rubies and Star Sapphires, and Process for Producing Same.” Plaintiff is the assignee of inventors Burdick and Glenn. Defendants have appealed from a judgment of the district court which held all claims of the patent valid and infringed.

The making of synthetic sapphires and rubies is almost fifty years old. In 1904 Auguste Verneuil published an article disclosing his method,…