Granted Patent
Utility
US 4,334,108 · App. 06/164,147
Process and apparatus for preparation of phenols
Inventors:
Katsuhiko Hashimoto, Hirohiko Nambu, Kazuhiro Watari, Kenichi Mizuno, Tadateru Murakami, Yutaka Matsuoka, Mitsutoshi Moriyama, Norio Ohno
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Jun 30, 1980
Inventors
Katsuhiko Hashimoto
Hirohiko Nambu
Kazuhiro Watari
Kenichi Mizuno
Tadateru Murakami
Yutaka Matsuoka
Mitsutoshi Moriyama
Norio Ohno
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.