Granted Patent
Utility
US 4,288,577 · App. 06/103,577
Novel urethanediols and polyurethanes therefrom
Inventor:
Herbert F. McShane, Jr.
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Dec 14, 1979
Inventor
Herbert F. McShane, Jr.
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.