Granted Patent
Utility
US 4,287,372 · App. 06/083,925
Preparation of nitro-substituted diphenyl ethers
Inventor:
Michael D. Tufano
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Oct 11, 1979
Inventor
Michael D. Tufano
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.