Granted Patent
Utility
US 4,384,062 · App. 06/329,630
Hydrolytically stable diphosphites useful as antioxidants
Inventor:
Wadim Batorewicz
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: Dec 11, 1981
Inventor
Wadim Batorewicz
Assignee (at issue)
Uniroyal Ltd.
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.