Granted Patent
Utility
US 4,293,470 · App. 06/168,898
Stabilizing polyurea polymer polyols by treating with a secondary amine
Inventor:
Michael Cuscurida
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Jul 11, 1980
Inventor
Michael Cuscurida
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.