Patents by Inventor Hisakazu Senda

Hisakazu Senda 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).

  • Production of water-insoluble alkali metal salts of carboxyalkyl cellulose
    Patent number: 4697008
    Abstract: A method of producing a water-insoluble alkali metal salt of carboxyalkyl cellulose such as CMC is disclosed. The method comprises reacting a water-soluble alkali metal salt of carboxyalkyl cellulose with an aliphatic hydroxycarboxylic acid.
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: September 29, 1987
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Hideharu Asano, Hisakazu Senda
  • Separation of wool fatty acid
    Patent number: 3983147
    Abstract: Wool fatty acid is effectively separated from wool alcohol or wool wax by treating a mixture of a multivalent metal soap of the fatty acid and the alcohol or wax with a heterogeneous system comprising a water phase and a water-immiscible solvent phase, and allowing the system to separate into respective phases.
    Type: Grant
    Filed: May 31, 1974
    Date of Patent: September 28, 1976
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Hisakazu Senda, Toshiaki Yamamoto, Hiroshi Ueno, Kazuo Nakano