Patents by Inventor Takayuki NONOYAMA

Takayuki NONOYAMA 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).

  • Hydrogel and method for producing hydrogel
    Patent number: 11492433
    Abstract: The hydrogel includes a first network structure and a second network structure. The second network structure is entwined with the first network structure. The first network structure contains a polymer crosslinked with a first crosslinking agent. The second network structure contains a polymer crosslinked with a second crosslinking agent. 50 mol % or more of the first crosslinking agent does not contain a decomposable bond. 50 mol % or more of the second crosslinking agent does not contain a decomposable bond.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: November 8, 2022
    Assignees: NGK SPARK PLUG CO., LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Masaya Iwata, Shinjiro Kasahara, Jian Ping Gong, Takayuki Kurokawa, Takayuki Nonoyama
  • Temperature-responsive gel having LCST with no volume phase transition, and production method therefor
    Patent number: 11248104
    Abstract: A temperature-responsive hydrogel which contains a carboxyl group-bearing polymer and a divalent-metal salt of an organic acid is provided. The carboxyl group-bearing polymer may be a homopolymer of a carboxyl group-bearing monomer or a copolymer of a plurality of monomers including the monomer. A method for producing the temperature-responsive hydrogel involves immersing a carboxyl group-bearing polymer in an aqueous solution of a divalent-metal salt of an organic acid. The concentration of the divalent-metal salt of an organic acid in the aqueous solution may be 50 mM to the saturation concentration. It is possible to provide a temperature-responsive gel having an LCST with no volume phase transition and a method for producing the temperature-responsive gel.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 15, 2022
    Assignee: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Takayuki Nonoyama, Jian Ping Gong, Yong Woo Lee, Kumi Ota
  • HYDROGEL AND METHOD FOR PRODUCING HYDROGEL
    Publication number: 20210054153
    Abstract: The hydrogel includes a first network structure and a second network structure. The second network structure is entwined with the first network structure. The first network structure contains a polymer crosslinked with a first crosslinking agent. The second network structure contains a polymer crosslinked with a second crosslinking agent. 50 mol % or more of the first crosslinking agent does not contain a decomposable bond. 50 mol % or more of the second crosslinking agent does not contain a decomposable bond.
    Type: Application
    Filed: April 23, 2019
    Publication date: February 25, 2021
    Applicants: NGK SPARK PLUG CO., LTD., NATIONAL UNIVERSITY CORPORATION HOKAIDO UNIVERSITY
    Inventors: Masaya IWATA, Shinjiro KASAHARA, Jian Ping GONG, Takayuki KUROKAWA, Takayuki NONOYAMA
  • TEMPERATURE-RESPONSIVE GEL HAVING LCST WITH NO VOLUME PHASE TRANSITION, AND PRODUCTION METHOD THEREFOR
    Publication number: 20200087485
    Abstract: A temperature-responsive hydrogel which contains a carboxyl group-bearing polymer and a divalent-metal salt of an organic acid is provided. The carboxyl group-bearing polymer may be a homopolymer of a carboxyl group-bearing monomer or a copolymer of a plurality of monomers including the monomer. A method for producing the temperature-responsive hydrogel involves immersing a carboxyl group-bearing polymer in an aqueous solution of a divalent-metal salt of an organic acid. The concentration of the divalent-metal salt of an organic acid in the aqueous solution may be 50 mM to the saturation concentration. It is possible to provide a temperature-responsive gel having an LCST with no volume phase transition and a method for producing the temperature-responsive gel.
    Type: Application
    Filed: December 20, 2017
    Publication date: March 19, 2020
    Inventors: Takayuki NONOYAMA, Jian Ping GONG, Yong Woo LEE, Kumi OTA