Patents by Inventor Shinsuke Yokomati

Shinsuke Yokomati 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).

  • Hydrophilic porous membrane, method of manufacturing the same and liquid filter using the same
    Patent number: 5203997
    Abstract: A hydrophilic porous membrane is obtained by covering porous membrane substrate with a non-ionic, amino-acid-based or non-ionic fluorine-based surface active agent. For the covering, the porous membrane substrate is immersed in a solution containing the surface active agent and then drying the membrane substrate. A different hydrophilic porous membrane is obtained by providing the surfaces of a porous membrane substrate and inner pore surfaces with a polar group and then covering the membrane substrate with a hydrophilic polymer film. For this covering, after introduction of the polar group to the surfaces of the porous membrane substrate and inner pore surfaces, the membrane substrate is immersed in a solution containing a hydrophilic substance and then dried.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: April 20, 1993
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Noriyuki Koyama, Shinsuke Yokomati, Yasushi Nemoto, Makoto Ohnishi