Granted Patent
Utility
US 4,772,740 · App. 06/708,313
Ethanolamine salt of N-Nitrosophenylhydroxylamine and inhibiting polymerization therewith
Inventor:
John W. Varwig
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Mar 5, 1985
Inventor
John W. Varwig
Assignee (at issue)
MALLINCKRODT LLC
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.