Granted Patent
Utility
US 6,492,541 · App. 10/005,817
Process for the preparation of 3-amino-2-oxo-pyrrolidines, novel intermediates and their use
Inventors:
Karlheinz Drauz, Gunter Knaup, Michael Schwarm
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Dec 7, 2001
Inventors
Karlheinz Drauz
Gunter Knaup
Michael Schwarm
Assignee (at issue)
Degussa-Huels 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.