Granted Patent
Utility
US 4,329,510 · App. 06/175,737
Process for purifying ketones
Inventors:
Kazutoyo Uno, Hisaya Miki
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Aug 6, 1980
Inventors
Kazutoyo Uno
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.