Granted Patent
Utility
US 4,956,169 · App. 07/169,951
Production process of chlorine
Inventors:
Masanobu Ajioka, Shinji Takenaka, Hiroyuki Itoh, Masafumi Kataita, Yoshitsugu Kohno
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Mar 18, 1988
Inventors
Masanobu Ajioka
Shinji Takenaka
Hiroyuki Itoh
Masafumi Kataita
Yoshitsugu Kohno
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.