Granted Patent
Utility
US 4,734,449 · App. 06/895,602
Synergistic mixtures of nickel-containing 2,2'-thiobis(alkylphenols) and 2-hydroxy-4-alkoxybenzophenones
Inventor:
Francois Gugumus
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Aug 7, 1986
Inventor
Francois Gugumus
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.