Patents by Inventor Ryosuke TAKECHI

Ryosuke TAKECHI 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).

  • Carboxyl-group-containing copolymer, and method for producing same
    Patent number: 11021557
    Abstract: The present invention provides a carboxyl group-containing copolymer having a better calcium ion trapping ability and a better carbon black dispersing ability than any conventional carboxyl group-containing copolymers. The present invention relates to a carboxyl group-containing copolymer including a structural unit (a) derived from an unsaturated monocarboxylic acid monomer (A), a structural unit (b) derived from an unsaturated dicarboxylic acid monomer (B), and a structural unit (c) derived from a cationic monomer (C).
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: June 1, 2021
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Hikaru Takahashi, Ryosuke Takechi, Yasuhiro Ono
  • COPOLYMER AND METHOD FOR PRODUCING SAME
    Publication number: 20210047451
    Abstract: The present invention provides a polymer having excellent dye transfer inhibition performance. The present invention relates to a copolymer containing a structural unit (a) derived from a N-vinyl lactam monomer (A) and a structural unit (b) derived from a monomer (B) represented by the following formula (1), (1?), or (1?). The structural unit (b) is present in a proportion of 1 to 99% by mass based on 100% by mass of all structural units.
    Type: Application
    Filed: March 29, 2019
    Publication date: February 18, 2021
    Inventors: Yasuhiro ONO, Ryosuke TAKECHI
  • CARBOXYL-GROUP-CONTAINING COPOLYMER, AND METHOD FOR PRODUCING SAME
    Publication number: 20200291153
    Abstract: The present invention provides a carboxyl group-containing copolymer having a better calcium ion trapping ability and a better carbon black dispersing ability than any conventional carboxyl group-containing copolymers. The present invention relates to a carboxyl group-containing copolymer including a structural unit (a) derived from an unsaturated monocarboxylic acid monomer (A), a structural unit (b) derived from an unsaturated dicarboxylic acid monomer (B), and a structural unit (c) derived from a cationic monomer (C).
    Type: Application
    Filed: November 22, 2017
    Publication date: September 17, 2020
    Inventors: Hikaru TAKAHASHI, Ryosuke TAKECHI, Yasuhiro ONO