Patents by Inventor Ryouyuu HIFUMI

Ryouyuu HIFUMI 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).

  • Polymer, composition, molded article, cured product and laminate
    Patent number: 11505651
    Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: November 22, 2022
    Assignee: JSR Corporation
    Inventors: Ryouyuu Hifumi, Toshiaki Kadota, Nobuyuki Miyaki, Shintarou Fujitomi, Yasutaka Yoshida, Ryouji Tatara
  • POLYMER, COMPOSITION, MOLDED ARTICLE, CURED PRODUCT AND LAMINATE
    Publication number: 20220235179
    Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.
    Type: Application
    Filed: April 5, 2022
    Publication date: July 28, 2022
    Applicant: JSR CORPORATION
    Inventors: Ryouyuu HIFUMI, Toshiaki KADOTA, Nobuyuki MIYAKI, Shintarou FUJITOMI, Yasutaka YOSHIDA, Ryouji TATARA
  • POLYMER, COMPOSITION, MOLDED ARTICLE, CURED PRODUCT, AND LAMINATE
    Publication number: 20200354512
    Abstract: A polymer, includes a first structural unit represented by formula (1), a second structural unit represented by formula (2-1), formula (2-2), or both, and a third structural unit represented by formula (3-1), formula (3-2), or both. The polymer preferably has a weight-average molecular weight in terms of polystyrene of 500 or more and 400,000 or less. A composition includes the polymer and an organic solvent. A molded body includes the polymer.
    Type: Application
    Filed: July 29, 2020
    Publication date: November 12, 2020
    Applicant: JSR CORPORATION
    Inventors: SHOUMA ANABUKI, Ryouyuu HIFUMI, Toshiaki KADOTA, Ryouji TATARA, Nobuyuki MIYAKI
  • POLYMER, COMPOSITION, MOLDED ARTICLE, CURED PRODUCT, AND LAMINATE
    Publication number: 20190169362
    Abstract: A polymer, includes a first structural unit represented by formula (1), a second structural unit represented by formula (2-1), formula (2-2), or both, and a third structural unit represented by formula (3-1), formula (3-2), or both. The polymer preferably has a weight-average molecular weight in terms of polystyrene of 500 or more and 400,000 or less. A composition includes the polymer and an organic solvent. A molded body includes the polymer.
    Type: Application
    Filed: January 28, 2019
    Publication date: June 6, 2019
    Applicant: JSR CORPORATION
    Inventors: Shouma ANABUKI, Ryouyuu HIFUMI, Toshiaki KADOTA, Ryouji TATARA, Nobuyuki MIYAKI
  • POLYMER, COMPOSITION, MOLDED ARTICLE, CURED PRODUCT AND LAMINATE
    Publication number: 20190055357
    Abstract: A novel polymer having high glass transition temperature and an excellent balance between heat resistance, high refractive index and mechanical properties, and a composition and molded article containing the polymer are provided. The polymer according to the invention has a first structural unit represented by at least one of formulae (1-1), (1-2) and (1-3) below and a second structural unit having either a secondary amino structure or a tertiary amino structure at two or more terminals.
    Type: Application
    Filed: October 19, 2018
    Publication date: February 21, 2019
    Applicant: JSR Corporation
    Inventors: Ryouyuu HIFUMI, Toshiaki Kadota, Nobuyuki Miyaki, Shintarou Fujitomi, Yasutaka Yoshida, Ryouji Tatara