Granted Patent
Utility
US 4,289,893 · App. 06/165,599
2,5-Inter-O-phenylene-3,4-dinor-PGF.sub.2 compounds
Inventors:
Udo F. Axen, John C. Sih
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jul 3, 1980
Inventors
Udo F. Axen
John C. Sih
Assignee (at issue)
The Upjohn Co.
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.