Patents by Inventor Taketoshi Tokita

Taketoshi Tokita 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).

  • Process for the production of an ion exchange membrane
    Patent number: 4294933
    Abstract: In the production of a heterogeneous ion exchange membrane in which an ion exchange resin fine powder is dispersed in a thermoplastic resin, a silane-modified polyolefin resin and ion exchange resin fine powder are kneaded, extruded to form a membrane and then subjected to a treatment with hot water, thus obtaining an ion exchange membrane having a high ion transport number in a high ion concentration and a low specific resistance in an aqueous solution of a polyvalent ion salt, which is well balanced.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: October 13, 1981
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Kunio Kihara, Hideo Toda, Eiki Yasukawa, Toshiaki Ishibashi, Taketoshi Tokita