Granted Patent
Utility
US 4,480,129 · App. 06/537,123
Process for separating isomers of toluidine
Inventors:
James W. Priegnitz, Hermann A. Zinnen
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Sep 29, 1983
Inventors
James W. Priegnitz
Hermann A. Zinnen
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.