Granted Patent
Utility
US 4,313,002 · App. 06/201,846
Preparation of p-aminodiphenylamines
Inventors:
Ted Symon, Paul R. Kurek, Michael D. Tufano
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Oct 29, 1980
Inventors
Ted Symon
Paul R. Kurek
Michael D. Tufano
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.