Granted Patent
Utility
US 4,254,041 · App. 06/126,477
19-Hydroxy-5-hydroxy-PGI compounds
Inventor:
John C. Sih
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Mar 3, 1980
Inventor
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.