Granted Patent
Utility
US 4,415,744 · App. 06/313,522
Vapor phase nitration of aromatic compounds
Inventors:
Ignatius Schumacher, Kang-Bo Wang
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Oct 21, 1981
Inventors
Ignatius Schumacher
Kang-Bo Wang
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.