Granted Patent
Utility
US 4,957,658 · App. 07/315,629
Process and composition for providing reduced discoloration caused by the presence of pyrithione and ferric ion in water-based paints and paint bases
Inventors:
Cheryl B. French, Sigmund Breister
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Feb 24, 1989
Inventors
Cheryl B. French
Sigmund Breister
Assignee (at issue)
Olin 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.