Granted Patent
Utility
US 6,281,383 · App. 09/404,811
Process for the preparation of .alpha.,.alpha.- dimethylphenylacetic acid from .alpha.,.alpha.-dimethylbenzyl cyanide under normal pressure
Inventors:
Gerhard Korb, Hans-Wolfram Flemming, Rudolf Lehnert, Wolfgang Rybczynski
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Sep 24, 1999
Inventors
Gerhard Korb
Hans-Wolfram Flemming
Rudolf Lehnert
Wolfgang Rybczynski
Assignee (at issue)
Aventis Pharma Deutschland GmbH
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.