Granted Patent
Utility
US 4,342,841 · App. 06/292,871
Polyamide polyurethane prepared by reaction of polyisocyanate with a 1,1-diamino ethylene
Inventors:
Louis M. Alberino, Dale F. Regelman
Patented Case
View Patent ↗
Granted: Aug 3, 1982
Filed: Aug 14, 1981
Inventors
Louis M. Alberino
Dale F. Regelman
Assignee (at issue)
The Upjohn Co.
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.