Patents by Inventor Shinichirou Izumi

Shinichirou Izumi 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).

  • Methacrylic acid ester polymer, method for producing same, active energy ray-curable composition, and optical recording medium
    Patent number: 10927198
    Abstract: A cured product that is reduced in warping and has high hardness can be obtained from an active energy ray-curable resin composition which uses a methacrylic acid ester polymer that has an acid value of 50 mg KOH/g or less and a transition metal content of 1 ppm or less, while containing 80% by mole or more of a polymer that has a double bond-terminated structure represented by formula (1). (In formula (1), R represents an alkyl group, a cycloalkyl group or an aryl group.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: February 23, 2021
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shinichirou Izumi, Mitsuhiro Matsuo, Masahiko Morooka, Kazuyoshi Odaka, Seiji Nushi, Kana Akeda, Eri Kawai
  • METHACRYLIC ACID ESTER POLYMER, METHOD FOR PRODUCING SAME, ACTIVE ENERGY RAY-CURABLE COMPOSITION, AND OPTICAL RECORDING MEDIUM
    Publication number: 20140349129
    Abstract: A cured product that is reduced in warping and has high hardness can be obtained from an active energy ray-curable resin composition which uses a methacrylic acid ester polymer that has an acid value of 50 mg KOH/g or less and a transition metal content of 1 ppm or less, while containing 80% by mole or more of a polymer that has a double bond-terminated structure represented by formula (1). (In formula (1), R represents an alkyl group, a cycloalkyl group or an aryl group.
    Type: Application
    Filed: December 14, 2012
    Publication date: November 27, 2014
    Applicant: Mitsubishi Rayon Co.,Ltd.
    Inventors: Shinichirou Izumi, Mitsuhiro Matsuo, Masahiko Morooka, Kazuyoshi Odaka, Seiji Nushi, Kana Akeda, Eri Kawai