Granted Patent
Utility
US 4,161,526 · App. 05/926,293
Zinc salt prevention or removal of discoloration in pyrithione, pyrithione salt and dipyrithione compositions
Inventor:
William G. Gorman
Patented Case
View Patent ↗
Granted: Jul 17, 1979
Filed: Jul 20, 1978
Inventor
William G. Gorman
Assignee (at issue)
Sterling Drug, 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.