Patents by Inventor Akira Michizuki

Akira Michizuki 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).

  • Liquid separation membrane for pervaporation
    Patent number: 4944881
    Abstract: A liquid separation membrane for pervaporation composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations; and a method for pervaporation, which comprises separating a water-organic liquid mixture or an organic liquid-organic liquid mixture by pervaporation using a separation membrane, said membrane being composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations and being dried so as to have a water content of not more than 25% by weight.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: July 31, 1990
    Assignee: Agency of Industrial Science and Technology
    Inventors: Akira Michizuki, Yoshio Sato, Hisashi Ogawara, Syuzo Yamashita
  • Liquid separation membrane for pervaporation
    Patent number: 4808313
    Abstract: A liquid separation membrane for pervaporation composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations; and a method for pervaporation, which comprises separating a water-organic liquid mixture or an organic liquid-organic liquid mixture by pervaporation using a separation membrane, said membrane being composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations and being dried so as to have a water content of not more than 25% by weight.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: February 28, 1989
    Assignee: Agency of Industrial Science and Technology
    Inventors: Akira Michizuki, Yoshio Sato, Hisashi Ogawara, Syuzo Yamashita