Granted Patent
Utility
US 4,270,013 · App. 06/086,489
Process for the separation of nitrotoluene isomers
Inventors:
James W. Priegnitz, Arthur M. Landis
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Oct 19, 1979
Inventors
James W. Priegnitz
Arthur M. Landis
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.