Granted Patent
Utility
US 5,461,041 · App. 08/183,644
Progestogen-only contraceptive
Inventors:
Engelbert W. Bergink, Herman Jan Tijmen Coelingh Bennink
Patented Case
View Patent ↗
Granted: Oct 24, 1995
Filed: Jan 19, 1994
Inventors
Engelbert W. Bergink
Herman Jan Tijmen Coelingh Bennink
Assignee (at issue)
AKZO NOBEL N.V.
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.