Granted Patent
Utility
US 5,670,652 · App. 08/503,225
Method of producing optically active, 4-substituted (S)-2-oxazolidinones
Inventors:
Karlheinz Drauz, Michael Schwarm
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Jul 17, 1995
Inventors
Karlheinz Drauz
Michael Schwarm
Assignee (at issue)
Degussa AG
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.