Granted Patent
Utility
US 4,769,174 · App. 07/139,834
Polyether silicone copolymers with secondary or tertiary hydroxy terminated for stabilizing high resiliency urethane foam
Inventor:
John A. Kilgour
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Dec 30, 1987
Inventor
John A. Kilgour
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.