International Patents Development Co. v. Penick & Ford, Ltd.

NTELDS, District Judge.

This is a patent suit charging defendant with infringement of three patents for the production of grape sugar. Grape sugar, corn sugar, dextrose, and dextrose hydrate are terms used interchangeably to describe the product of the patents. The defenses are invalidity, noninfringement, license, and estoppel.

The first, patent, No. 1,471,347, granted October 23, 1923, to William B. New-kirk, assignor to Corn Products Refining Company, for a “Method of Making Grape Sugar,” is a process patent. The second patent, No. 1,508,569, dated September 16, 1924, to Newkirk, assignor to…