Granted Patent
Utility
US 4,463,050 · App. 06/429,588
"Polyurethane catalyst system additive which permits the use of relatively ""cold"" molds"
Inventor:
Robert L. Zimmerman
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Sep 30, 1982
Inventor
Robert L. Zimmerman
Assignee (at issue)
Texaco Inc.
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.