Granted Patent
Utility
US 5,296,017 · App. 07/888,360
Method and apparatus for concentrating chlorine gas
Inventors:
Yoshitsugu Kono, Masaaki Ura, Hiroyuki Itoh, Satoshi Tsuruda
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: May 27, 1992
Inventors
Yoshitsugu Kono
Masaaki Ura
Hiroyuki Itoh
Satoshi Tsuruda
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.