Granted Patent
Utility
US 4,985,462 · App. 07/435,479
Alicyclic compounds and their contraceptive use
Inventors:
James A. Baker, Stuart JAMES, Tuncel Ibrahim, Christopher Marriott
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Dec 4, 1989
Inventors
James A. Baker
Stuart JAMES
Tuncel Ibrahim
Christopher Marriott
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.