Granted Patent
Utility
US 5,442,067 · App. 08/323,478
Tetra-[N-alkyl-2,2,6,6,-tetramethylpiperidin-4-yl]-4,4'-diphenylbis phosphonite
Inventor:
Rita Pitteloud
Patented Case
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Granted: Aug 15, 1995
Filed: Oct 14, 1994
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.