Granted Patent
Utility
US 4,198,490 · App. 05/841,094
Polyurethane foams from polyol reaction products of N-.alpha.-alkylols with polyols
Inventor:
Gwilym E. Owen, Jr.
Patented Case
View Patent ↗
Granted: Apr 15, 1980
Filed: Oct 11, 1977
Inventor
Gwilym E. Owen, Jr.
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.