Granted Patent
Utility
US 4,351,967 · App. 06/202,482
Process for producing phenolic compounds
Inventors:
Tadahiko Nishimura, Hiroshi Yamamoto, Masatoshi Osuo, Akio Kanazawa
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Oct 31, 1980
Inventors
Tadahiko Nishimura
Hiroshi Yamamoto
Masatoshi Osuo
Akio Kanazawa
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.