Granted Patent
Utility
US 5,442,121 · App. 08/335,744
Process for producing N,N-disubstituted aminophenol
Inventors:
Shigeki Nagamatsu, Tomohiro Arase, Masaaki Yasuda
Patented Case
View Patent ↗
Granted: Aug 15, 1995
Filed: Nov 15, 1994
Inventors
Shigeki Nagamatsu
Tomohiro Arase
Masaaki Yasuda
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.