Patents by Inventor Kumi OTA

Kumi OTA 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).

  • 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
  • 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