Patents by Inventor Yoshiya Kobayashi

Yoshiya Kobayashi 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).

  • Inkjet ink copolymer and inkjet ink pigment dispersion and inkjet ink using the same
    Patent number: 8993674
    Abstract: To provide an inkjet ink polymer capable of providing an inkjet ink capable of forming a printed product having excellent weather resistance, print density (coloring properties), and fixability (abrasion properties) with good productivity and providing a pigment dispersion having excellent dispersibility with good productivity. An inkjet ink copolymer contains 10 to 99% by weight of a cyclohexyl methacrylate unit and 1 to 90% by weight of an acrylic acid unit. The purpose is achieved by an inkjet ink pigment dispersion containing the inkjet ink copolymer and a pigment.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: March 31, 2015
    Assignee: Sanyo Color Works, Ltd.
    Inventors: Minoru Yoshida, Atsushi Ishikawa, Yoshiya Kobayashi, Kazuki Sase, Eiji Morimoto
  • INKJET INK COPOLYMER AND INKJET INK PIGMENT DISPERSION AND INKJET INK USING THE SAME
    Publication number: 20130338302
    Abstract: To provide an inkjet ink polymer capable of providing an inkjet ink capable of forming a printed product having excellent weather resistance, print density (coloring properties), and fixability (abrasion properties) with good productivity and providing a pigment dispersion having excellent dispersibility with good productivity. An inkjet ink copolymer contains 10 to 99% by weight of a cyclohexyl methacrylate unit and 1 to 90% by weight of an acrylic acid unit. The purpose is achieved by an inkjet ink pigment dispersion containing the inkjet ink copolymer and a pigment.
    Type: Application
    Filed: February 28, 2012
    Publication date: December 19, 2013
    Applicant: SANYO COLOR WORKS, LTD.
    Inventors: Minoru Yoshida, Atsushi Ishikawa, Yoshiya Kobayashi, Kazuki Sase, Eiji Morimoto