Granted Patent
Utility
US 4,395,572 · App. 06/255,425
Process for preparing N-alkyl-nitroanilines
Inventor:
John K. Chan
Patented Case
View Patent ↗
Granted: Jul 26, 1983
Filed: Apr 20, 1981
Inventor
John K. Chan
Assignee (at issue)
Union Carbide Corporation
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.