Granted Patent
Utility
US 4,331,608 · App. 06/155,673
Liquid phase catalytic co-oxidation process
Inventors:
Keiji Kawamoto, Toshihiro Yoshioka
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Jun 2, 1980
Inventors
Keiji Kawamoto
Toshihiro Yoshioka
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.