Granted Patent
Utility
US 4,822,589 · App. 07/148,508
Manufacturing process of chlorine
Inventors:
Tadamitsu Kiyoura, Yasuo Kogure, Tokio Nagayama, Kazuo Kanaya
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Jan 26, 1988
Inventors
Tadamitsu Kiyoura
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.