Granted Patent
Utility
US 4,357,430 · App. 06/308,052
Polymer/polyols, methods for making same and polyurethanes based thereon
Inventor:
Russell VanCleve
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Oct 2, 1981
Inventor
Russell VanCleve
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.