Granted Patent
Utility
US 4,803,282 · App. 06/900,856
Alpha-substituted ketonitrone derivatives
Inventors:
Vassil St. Georgiev, George B. Mullen
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Aug 27, 1986
Inventors
Vassil St. Georgiev
George B. Mullen
Assignee (at issue)
Pennwalt 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.