Granted Patent
Utility
US 4,243,636 · App. 06/010,914
Apparatus for the continuous liquid-phase catalytic oxidation of alkyl-substituted aromatic compounds
Inventors:
Shigemi Shiraki, Ryoichi Yamamoto
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Feb 9, 1979
Inventors
Shigemi Shiraki
Ryoichi Yamamoto
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.