Granted Patent
Utility
US 5,569,652 · App. 08/162,387
Dihydrospirorenone as an antiandrogen
Inventors:
Sybille Beier, Walter Elger, Yukishige Nishino, Rudolf Wiechert
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: Dec 7, 1993
Inventors
Sybille Beier
Walter Elger
Yukishige Nishino
Rudolf Wiechert
Assignee (at issue)
SCHERING 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.