Granted Patent
Utility
US 4,886,626 · App. 07/122,371
Conductive polyurethane foam compositions containing tetralyanoethylene and method
Inventors:
Richard P. Cope, Leo Fisher
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Nov 19, 1987
Inventors
Richard P. Cope
Leo Fisher
Assignee (at issue)
Crest-Foam 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.