Granted Patent
Utility
US 4,287,314 · App. 06/184,502
Maleimide-styrene copolymer blend with polyurethane
Inventor:
Ronald A. Fava
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Sep 5, 1980
Inventor
Ronald A. Fava
Assignee (at issue)
Arco Polymers, Inc.
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.