Granted Patent
Utility
US 6,121,465 · App. 09/242,334
Process for production drospirenone and intermediate products of the process
Inventors:
Jörg MOHR, Klaus Nickisch
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Feb 11, 1999
Inventors
Jörg MOHR
Klaus Nickisch
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.