Patents by Inventor Tomoharu TACHIKAWA

Tomoharu TACHIKAWA 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).

  • Resin composition and fluidity improvement method
    Patent number: 11760717
    Abstract: The resin composition of the present disclosure contains a fluorene derivative represented by the following formula (1) and a polyamide-series resin: Wherein R1 represents a substituent, k denotes an integer of 0 to 8, R2a, R2b, R2c, and R2d each represent a hydrogen atom or a substituent, R3a and R3b each represent a hydrogen atom or a substituent, and X1a and X1b each represent a group defined in the following formula (X1): wherein R4 and R5 each represent a hydrogen atom or a hydrocarbon group; or R4 and R5 bend together to form a heterocyclic ring containing the nitrogen atom adjacent to R4 and R5. The resin composition has an excellent fluidity.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: September 19, 2023
    Assignee: OSAKA GAS CHEMICALS CO., LTD.
    Inventors: Yuki Ouchi, Shinichi Kamei, Tomoharu Tachikawa, Tomoya Hasegawa, Haruka Katakura
  • RESIN COMPOSITION AND FLUIDITY IMPROVEMENT METHOD
    Publication number: 20230102437
    Abstract: The resin composition of the present disclosure contains a fluorene derivative represented by the following formula (1) and a polyamide-series resin: Wherein R1 represents a substituent, k denotes an integer of 0 to 8, R2a, R2b, R2c, and R2d each represent a hydrogen atom or a substituent, R3a and R3b each represent a hydrogen atom or a substituent, and X1a and X1b each represent a group defined in the following formula (X1): wherein R4 and R5 each represent a hydrogen atom or a hydrocarbon group; or R4 and R5 bend together to form a heterocyclic ring containing the nitrogen atom adjacent to R4 and R5. The resin composition has an excellent fluidity.
    Type: Application
    Filed: December 21, 2020
    Publication date: March 30, 2023
    Applicant: Osaka Gas Chemicals Co., Ltd.
    Inventors: Yuki OUCHI, Shinichi KAMEl, Tomoharu TACHIKAWA, Tomoya HASEGAWA, Haruka KATAKURA