Granted Patent
Utility
US 4,392,994 · App. 06/202,031
Corrosion inhibitor for cellulosic insulation
Inventor:
Anthony P. Wagener
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Oct 29, 1980
Inventor
Anthony P. Wagener
Assignee (at issue)
The Sherwin-Williams Company
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.