Granted Patent
Utility
US 4,411,805 · App. 06/338,444
"N,N',N""-Trisubstituted-bis-(p-aminobenzyl) anilines as antioxidants"
Inventor:
John T. Roberts
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Jan 8, 1982
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.