Granted Patent
Utility
US 4,492,661 · App. 06/510,706
Process for producing triarylphosphites
Inventors:
Rudolf Maul, Eberhard Otto, Horst Zinke
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Jul 5, 1983
Inventors
Rudolf Maul
Eberhard Otto
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.