Granted Patent
Utility
US 4,684,519 · App. 06/849,918
Method of preparing a polyvinylpyrrolidone-halogen complex of improved stability
Inventor:
Eugene S. Barabas
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Apr 9, 1986
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.