Granted Patent
Utility
US 4,367,337 · App. 06/222,446
Process for conversion of benzimidazolones to benzotriazoles
Inventor:
Frederick W. Sullivan
Patented Case
View Patent ↗
Granted: Jan 4, 1983
Filed: Jan 5, 1981
Inventor
Frederick W. Sullivan
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.