Granted Patent
Utility
US 4,925,944 · App. 07/326,846
Process for the preparation of o-carboxypyridyl- and o-carboxyquinolylimidazolinones
Inventor:
Robert F. Doehner, Jr.
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Mar 21, 1989
Inventor
Robert F. Doehner, Jr.
Assignee (at issue)
American Cyanamid 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.