Granted Patent
Utility
US 4,440,696 · App. 06/307,474
Process for producing triarylphosphites
Inventors:
Rudolf Maul, Eberhard Otto, Horst Zinke
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Oct 1, 1981
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.