Granted Patent
Utility
US 4,486,277 · App. 06/493,574
Electrolytic cation exchange membrane
Inventors:
Haruhisa Miyake, Manabu Suhara, Hiroshi Mori, Yoshihiko Saito
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: May 11, 1983
Inventors
Haruhisa Miyake
Manabu Suhara
Hiroshi Mori
Yoshihiko Saito
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.