Patents by Inventor Shigekazu Oi

Shigekazu Oi 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).

  • Porous resin film and ink jet recording medium
    Patent number: 7910201
    Abstract: A porous resin film which is obtained from a compound prepared by kneading a composition comprising 30 to 100% by weight of a thermoplastic resin comprising a hydrophilic thermoplastic resin and 0 to 70% by weight of an inorganic and/or an organic powder in an intermeshing twin-screw extruder at a screw shear rate of 300 sec?1 or higher and which has a liquid absorbing capacity of 0.5 ml/m2 or more as measured in accordance with the method specified in Japan TAPPI Standard No. 51-87.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: March 22, 2011
    Assignee: Yupo Corporation
    Inventors: Yasuo Iwasa, Shigekazu Oi
  • Porous resin film and ink jet recording medium
    Publication number: 20020028320
    Abstract: A porous resin film which is obtained from a compound prepared by kneading a composition comprising 30 to 100% by weight of a thermoplastic resin comprising a hydrophilic thermoplastic resin and 0 to 70% by weight of an inorganic and/or an organic powder in an intermeshing twin-screw extruder at a screw shear rate of 300 sec−1 or higher and which has a liquid absorbing capacity of 0.5 ml/m2 or more as measured in accordance with the method specified in Japan TAPPI Standard No. 51-87.
    Type: Application
    Filed: April 25, 2001
    Publication date: March 7, 2002
    Inventors: Yasuo Iwasa, Shigekazu Oi