Granted Patent
Utility
US 5,696,281 · App. 08/454,362
Liquid phenolic antioxidants
Inventor:
Samuel Evans
Patented Case
View Patent ↗
Granted: Dec 9, 1997
Filed: Jun 20, 1995
Inventor
Samuel Evans
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.