Patents by Inventor Yuhei SOGA

Yuhei SOGA 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).

  • Polycondensation catalyst for producing polyester and production of polyester using the same
    Patent number: 11612882
    Abstract: The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction of a dicarboxylic acid or an ester-forming derivative thereof and a glycol, wherein the polycondensation catalyst comprises particles of a water-insoluble or hardly water-soluble phosphate having on the surfaces a coating layer of titanic acid in an amount, of 0.1 to 100 parts by weight in terms of TiO2 per 100 parts by weight of the phosphate.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: March 28, 2023
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Yuhei Soga, Akihiro Kamon
  • POLYCONDENSATION CATALYST FOR PRODUCING POLYESTER AND PRODUCTION OF POLYESTER USING THE SAME
    Publication number: 20210170371
    Abstract: The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction of a dicarboxylic acid or an ester-forming derivative thereof and a glycol, wherein the polycondensation catalyst comprises particles of a water-insoluble or hardly water-soluble phosphate having on the surfaces a coating layer of titanic acid in an amount, of 0.1 to 100 parts by weight in terms of TiO2 per 100 parts by weight of the phosphate.
    Type: Application
    Filed: December 11, 2018
    Publication date: June 10, 2021
    Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Yuhei SOGA, Akihiro KAMON