Granted Patent
Utility
US 4,386,002 · App. 06/263,378
Imines of aminodiphenyl esthers as antioxidants and lubricating oils and greases containing same
Inventor:
John T. Roberts
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: May 12, 1981
Inventor
John T. Roberts
Assignee (at issue)
UOP LLC
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.