Patents by Inventor Frank Stevens

Frank Stevens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

Substituted pyrimido-[4,5-d]-pyrimidine compounds useful for repelling insects, rodents or animals from substrates

Patent number: 4038394

Abstract: Pest repellency afforded by the presence of an effective amount of 2,7-dioxo (or dithio) decahydropyrimido-[4,5-d]-pyrimidines; compositions and treatments therewith; and pest repellent structures.

Type: Grant

Filed: April 28, 1975

Date of Patent: July 26, 1977

Assignee: Celanese Corporation

Inventors: Adin Lee Stautzenberger, Frank Stevens Wagner

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Substituted pyrimido-[4,5-d]-pyrimidine compounds useful for repelling insects, rodents or animals from substrates