Granted Patent
Utility
US 4,628,131 · App. 06/671,360
Vapor phase nitration of aromatic compounds
Inventor:
Ignatius Schumacher
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: Nov 14, 1984
Inventor
Ignatius Schumacher
Assignee (at issue)
Monsanto Company
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.