Patents by Inventor Mitsunobu Fukumoto

Mitsunobu Fukumoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electrolysis of aqueous alkali metal halide solution
    Patent number: 4209367
    Abstract: An electrolytic cell having anode and cathode chambers separated by a cation exchange membrane comprising a fluorocarbon polymer containing pendant carboxylic acid or salt groups of the formula ##STR1## wherein R is a group containing perfluoroalkyl or perfluoroalkoxy having 1 to 5 carbon atoms and M is hydrogen, an alkali or alkaline earth metal or ammonium as a surface stratum on the cathode side of the membrane.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: June 24, 1980
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Maomi Seko, Yasumichi Yamakoshi, Hirotsugu Miyauchi, Kyoji Kimoto, Toshioki Hane, Mitsunobu Fukumoto, Itaru Watanabe, Sakae Tsushima
  • Cation exchange membrane preparation and use thereof
    Patent number: 4151053
    Abstract: Cation exchange membrane comprising a fluorocarbon polymer characterized by the presence of pendant carboxylic acid groups of the formula -- OCF.sub.2 COOH -- and derivatives thereof.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: April 24, 1979
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Naomi Seko, Yasumichi Yamakoshi, Hirotsugu Miyauchi, Mitsunobu Fukumoto, Kyoji Kimoto, Itaru Watanabe, Toshioki Hane, Sakae Tsushima
  • Process for production of perfluorocarbon type cation exchange membrane
    Patent number: 4093568
    Abstract: A perfluorocarbon type cation exchange membrane prepared by treatment with an oxidizing agent of a cation exchange membrane containing perfluorocarbon polymers having specific pendant N-sulfonamide groups has improved electrochemical characteristics when used as a membrane in electrolysis of aqueous alkali halide solution.
    Type: Grant
    Filed: November 2, 1976
    Date of Patent: June 6, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Maomi Seko, Yasumichi Yamakoshi, Hirotsugu Miyauchi, Mitsunobu Fukumoto, Kyoji Kimoto, Itaru Watanabe, Shigeo Yokoyama
  • Reinforced ion-exchange membrane
    Patent number: 4072793
    Abstract: A leno-woven fabric of a specific construction is found to effectively reinforce an ion-exchange membrane at a scarce density of reinforcing yarns to improve electrochemical property of the reinforced ion-exchange membrane.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: February 7, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Itaru Watanabe, Yasumichi Yamakoshi, Hirotsugu Miyauchi, Sakae Tsushima, Mitsunobu Fukumoto