Granted Patent
Utility
US 5,322,871 · App. 08/049,647
Asymmetric aryl phosphites
Inventors:
Rita Pitteloud, Peter Hofmann, Rudolf Maul, Volker Schenk, Eduard Troxler, Horst Zinke
Patented Case
View Patent ↗
Granted: Jun 21, 1994
Filed: Apr 20, 1993
Inventors
Rita Pitteloud
Peter Hofmann
Rudolf Maul
Volker Schenk
Eduard Troxler
Horst Zinke
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.