Granted Patent
Utility
US 5,670,642 · App. 08/572,990
Hals phosphoramides as stabilisers
Inventor:
Rita Pitteloud
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Dec 15, 1995
Inventor
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.