Granted Patent
Utility
US 6,495,694 · App. 09/843,061
Efficient separation of enantiomers of piperidone derivatives by precipitation of the desired eantiomer during in situ racemization of the unwanted enantiomer
Inventors:
Hermann Mueller-Boetticher, Gerd-Rainer Bressler, Paul Kreye
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Apr 26, 2001
Inventors
Hermann Mueller-Boetticher
Gerd-Rainer Bressler
Paul Kreye
Assignee (at issue)
BOEHRINGER INGELHEIM PHARMA GMBH & CO. KG
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.