Granted Patent
Utility
US 4,467,119 · App. 06/491,359
Phenolic antioxidant
Inventor:
Royston M. Thomas
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: May 4, 1983
Inventor
Royston M. Thomas
Assignee (at issue)
ICI Americas, Inc.
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.