Granted Patent
Utility
US 4,237,282 · App. 06/041,359
Urea derivative and use as polyurethane catalyst
Inventors:
George P. Speranza, Robert L. Zimmerman
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: May 22, 1979
Inventors
George P. Speranza
Robert L. Zimmerman
Assignee (at issue)
Texaco Development 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.