Granted Patent
Utility
US 4,705,806 · App. 05/877,253
Prostacyclin analogs
Inventor:
Douglas R. Morton, Jr.
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: Feb 13, 1978
Inventor
Douglas R. Morton, Jr.
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.