Granted Patent
Utility
US 5,122,235 · App. 07/555,497
Process for the removal of chloroprene from, 1,2-dichloroethane
Inventors:
Kenji Shirai, Seiji Nagae, Tadashi Naito, Atsushi SHIRAI
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Aug 10, 1990
Inventors
Kenji Shirai
Seiji Nagae
Tadashi Naito
Atsushi SHIRAI
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.