Granted Patent
Utility
US 4,244,831 · App. 05/674,649
Silicone-hydrocarbon compositions
Inventor:
Robert A. Cupper
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Apr 7, 1976
Inventor
Robert A. Cupper
Assignee (at issue)
Union Carbide Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.