Granted Patent
Utility
US 4,508,603 · App. 05/957,453
Fluorinated cation exchange membrane and use thereof in electrolysis of an alkali metal halide
Inventors:
Hiroshi Ukihashi, Tatsuro Asawa, Masaaki Yamabe, Haruhisa Miyake
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Nov 3, 1978
Inventors
Hiroshi Ukihashi
Tatsuro Asawa
Masaaki Yamabe
Haruhisa Miyake
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.