Granted Patent
Utility
US 4,581,384 · App. 06/687,412
Method of producing a polyurethane foam from a polyol containing an unsaturated polyester and a polyisocyanate containing a vinylidene monomer
Inventor:
Donald L. Marion
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Dec 28, 1984
Inventor
Donald L. Marion
Assignee (at issue)
Atlantic Richfield 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.