Granted Patent
Utility
US 4,828,815 · App. 07/132,665
Production process of chlorine
Inventors:
Tadamitsu Kiyoura, Masanobu Ajioka, Naoshi Fujimoto, Toshihide Suzuki, Yasuo Kogure, Tokio Nagayama, Kazuo Kanaya
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Dec 10, 1987
Inventors
Tadamitsu Kiyoura
Masanobu Ajioka
Naoshi Fujimoto
Toshihide Suzuki
Yasuo Kogure
Tokio Nagayama
Kazuo Kanaya
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.