Granted Patent
Utility
US 4,962,218 · App. 07/268,187
Silicone polyether copolymers and polyurethane foams prepared therefrom
Inventors:
Charles H. Blevins, II, George H. Greene, Paul L. Matlock, Gerald J. Murphy
Patented Case
View Patent ↗
Granted: Oct 9, 1990
Filed: Nov 7, 1988
Inventors
Charles H. Blevins, II
George H. Greene
Paul L. Matlock
Gerald J. Murphy
Assignee (at issue)
Union Carbide Chemicals & Plastics
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.