Granted Patent
Utility
US 4,774,070 · App. 07/013,426
Production process of chlorine
Inventors:
Hiroyuki Itoh, Yoshitsugu Kono, Masanobu Ajioka, Shinji Takenaka, Masafumi Kataita
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Feb 11, 1987
Inventors
Hiroyuki Itoh
Yoshitsugu Kono
Masanobu Ajioka
Shinji Takenaka
Masafumi Kataita
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.