Granted Patent
Utility
US 4,871,862 · App. 07/254,548
.alpha.-Substituted ketonitrone derivatives
Inventors:
Vassil S. Georgiev, George B. Mullen
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Oct 6, 1988
Inventors
Vassil S. Georgiev
George B. Mullen
Assignee (at issue)
Fisons Ltd.
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.