Granted Patent
Utility
US 5,665,273 · App. 08/416,660
Hals phosphonites as stabilizers
Inventors:
Michael Rasberger, Rita Pitteloud
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Apr 5, 1995
Inventors
Michael Rasberger
Rita Pitteloud
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.