Granted Patent
Utility
US 4,267,387 · App. 06/085,587
Process for preparation of aromatic hydroperoxides
Inventors:
Ichiro Imai, Isao Hashimoto, Keiji Suzuki, Hiroaki Nakagawa
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Oct 17, 1979
Inventors
Ichiro Imai
Isao Hashimoto
Keiji Suzuki
Hiroaki Nakagawa
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.