Granted Patent
Utility
US 5,322,964 · App. 08/118,107
Process for the preparation of alpha-aminoketone salts
Inventors:
Rolf Drewes, Hans-Helmut Friedrich
Patented Case
View Patent ↗
Granted: Jun 21, 1994
Filed: Sep 8, 1993
Inventors
Rolf Drewes
Hans-Helmut Friedrich
Assignee (at issue)
Ciba-Geigy
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.