Granted Patent
Utility
US 5,939,561 · App. 08/852,611
Process for the preparation of .beta.-phenylisoserine and .beta.-lactam and their analogues
Inventors:
Jean-Dominique Bourzat, Alain Commercon
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: May 7, 1997
Inventors
Jean-Dominique Bourzat
Alain Commercon
Assignee (at issue)
RHONE-POULENC RORER S.A.
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.