Granted Patent
Utility
US 4,517,394 · App. 06/563,216
Preparation of nitro compounds by vapor phase nitration of carboxylic acids
Inventors:
Shu-Chieh P. Wang, Martin B. Sherwin
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Dec 19, 1983
Inventors
Shu-Chieh P. Wang
Martin B. Sherwin
Assignee (at issue)
W. R. Grace & Co.
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.