Granted Patent
Utility
US 4,351,759 · App. 06/246,341
Alkylated 2,2'-biphenylene phosphites and stabilized compositions
Inventor:
John D. Spivack
Patented Case
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Granted: Sep 28, 1982
Filed: Mar 23, 1981
Inventor
John D. Spivack
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.