Granted Patent
Utility
US 5,085,752 · App. 07/595,284
Electrolytic cell
Inventors:
Naruyuki Iwanaga, Tosiaki Yamaguti, Nobuhiko Fujieda, Yoshihiro Tsuzikawa
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Oct 10, 1990
Inventors
Naruyuki Iwanaga
Tosiaki Yamaguti
Nobuhiko Fujieda
Yoshihiro Tsuzikawa
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.