Granted Patent
Utility
US 5,354,486 · App. 08/114,115
Phenol group-containing compounds as anti-oxidants in organic materials
Inventor:
Samuel Evans
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Aug 30, 1993
Inventor
Samuel Evans
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.