Granted Patent
Utility
US 5,583,129 · App. 08/268,996
Composition for contraception
Inventors:
J urgen Spona, Bernd D usterberg, Frank L udicke
Patented Case
View Patent ↗
Granted: Dec 10, 1996
Filed: Jun 30, 1994
Inventors
J urgen Spona
Bernd D usterberg
Frank L udicke
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.