Patents by Inventor Koki Shiduka

Koki Shiduka 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).

  • Resin-coated sand
    Patent number: 7267876
    Abstract: The resin-coated sand is produced by coating the surface of a refractory granular aggregate with a thermosetting resin and a thermoplastic resin. When using this resin-coated sand, a mold with a less rough surface can be produced by a RP molding apparatus. When using this mold made of the resin-coated sand, a casting with fewer gas defects can be produced.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: September 11, 2007
    Assignee: Gun Ei Chemical Industry Co., Ltd.
    Inventors: Akihiro Okubo, Tatsunosuke Murakami, Fumitoshi Takeuchi, Koki Shiduka
  • Resin-coated sand
    Publication number: 20060284346
    Abstract: The resin-coated sand is produced by coating the surface of a refractory granular aggregate with a thermosetting resin and a thermoplastic resin. When using this resin-coated sand, a mold with a less rough surface can be produced by a RP molding apparatus. When using this mold made of the resin-coated sand, a casting with fewer gas defects can be produced.
    Type: Application
    Filed: August 11, 2006
    Publication date: December 21, 2006
    Applicant: GUN EI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Akihiro Okubo, Tatsunosuke Murakami, Fumitoshi Takeuchi, Koki Shiduka
  • Resin-coated sand
    Publication number: 20040197558
    Abstract: The resin-coated sand is produced by coating the surface of a refractory granular aggregate with a thermosetting resin and a thermoplastic resin. When using this resin-coated sand, a mold with a less rough surface can be produced by a RP molding apparatus. When using this mold made of the resin-coated sand, a casting with fewer gas defects can be produced.
    Type: Application
    Filed: March 31, 2004
    Publication date: October 7, 2004
    Applicant: Gun Ei Chemical Industry Co., Ltd.
    Inventors: Akihiro Okubo, Tatsunosuke Murakami, Fumitoshi Takeuchi, Koki Shiduka