Granted Patent
Utility
US 4,600,759 · App. 06/679,780
Process for making copolymers of vinylpyrrolidone and maleic anhydride
Inventor:
Eugene S. Barabas
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Dec 10, 1984
Inventor
Eugene S. Barabas
Assignee (at issue)
GAF Corporation
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.