Granted Patent
Utility
US 4,235,791 · App. 06/081,956
Process for dehydrogenation of sterols to produce delta 4-3-ketosteroids
Inventor:
Charles H. Foster
Patented Case
View Patent ↗
Granted: Nov 25, 1980
Filed: Oct 4, 1979
Inventor
Charles H. Foster
Assignee (at issue)
EASTMAN KODAK COMPANY
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.