Granted Patent
Utility
US 4,347,393 · App. 06/294,204
Process for continuous production of cumene and/or diisopropylbenzene
Inventor:
Hisaya Miki
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Aug 19, 1981
Inventor
Hisaya Miki
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.