Granted Patent
Utility
US 4,804,734 · App. 07/101,215
Polyurethane composition consisting essentially of a polyether diol, a polyether triol, glycerol, and a polyisocyanate
Inventors:
Cung Vu, Richard C. Hartwig
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Sep 25, 1987
Inventors
Cung Vu
Richard C. Hartwig
Assignee (at issue)
W.R. Grace & Co. Conn.
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.