Patents by Inventor Shujiro Otsuki

Shujiro Otsuki 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).

  • METHOD FOR PRODUCING SULFURIZED OLEFIN
    Publication number: 20250115550
    Abstract: Provided is a method for producing sulfurized olefin, the method including reacting an olefin compound (a) represented by R1R2C?CHR3 . . . (1) (in Formula (1), R1 and R2 each are alkyl groups, respectively, R3 is a hydrogen atom or an alkyl group, and the total number of carbon atoms of R1, R2 and R3 is 2 to 20) with sulfur in the presence of hydrogen to give a dialkyl polysulfide (A).
    Type: Application
    Filed: February 15, 2023
    Publication date: April 10, 2025
    Applicants: DIC Corporation, Kyushu University, National University Corporation
    Inventors: Hironobu Matsueda, Hiroshi Sakata, Shujiro Otsuki, Eiji Yamamoto, Makoto Tokunaga, Haruno Murayama, Yuta Takaki, Yasutaka Kawai, Kei Takakura, Moemi Kimura
  • Rubber-metal adhesion promoter, rubber composition, and tire
    Patent number: 11427698
    Abstract: A rubber-metal adhesion promoter characterized by including: a metal salt (1) of a carboxylic acid which is a metal salt of an aliphatic carboxylic acid having 2 to 25 carbon atoms and in which the metal is bismuth, copper, antimony, silver or niobium; or a compound (2) represented by the following general formula (A): [wherein Z represents a structure selected from the following formulae (z-1) to (z-4); M represents bismuth, copper, antimony, silver or niobium; (RCOO) represents a residue of an aliphatic carboxylic acid having 2 to 25 carbon atoms; and x represents the valence of M minus 1].
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: August 30, 2022
    Assignees: DIC Corporation, National University Corporation, Iwate University
    Inventors: Shujiro Otsuki, Takayuki Odashima, Hidetoshi Hirahara
  • RUBBER-METAL ADHESION PROMOTER, RUBBER COMPOSITION, AND TIRE
    Publication number: 20190375911
    Abstract: A rubber-metal adhesion promoter characterized by including: a metal salt (1) of a carboxylic acid which is a metal salt of an aliphatic carboxylic acid having 2 to 25 carbon atoms and in which the metal is bismuth, copper, antimony, silver or niobium; or a compound (2) represented by the following general formula (A): [wherein Z represents a structure selected from the following formulae (z-1) to (z-4); M represents bismuth, copper, antimony, silver or niobium; (RCOO) represents a residue of an aliphatic carboxylic acid having 2 to 25 carbon atoms; and x represents the valence of M minus 1].
    Type: Application
    Filed: August 23, 2019
    Publication date: December 12, 2019
    Inventors: Shujiro Otsuki, Takayuki Odashima, Hidetoshi Hirahara
  • Rubber-metal adhesion promoter, rubber composition, and tire
    Patent number: 10450439
    Abstract: A rubber-metal adhesion promoter characterized by including a compound (1) represented by the following general formula (A): (in the formula, Z represents a structure selected from the following formulae (z-1) to (z-4); M represents titanium or zirconium; and (RCOO) represents a residue of an aliphatic carboxylic acid having 2 to 25 carbon atoms)
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: October 22, 2019
    Assignees: DIC Corporation, National University Corporation, Iwate University
    Inventors: Shujiro Otsuki, Takayuki Odashima, Hidetoshi Hirahara
  • RUBBER-METAL ADHESION PROMOTER, RUBBER COMPOSITION, AND TIRE
    Publication number: 20170260357
    Abstract: A rubber-metal adhesion promoter characterized by including a compound (1) represented by the following general formula (A): (in the formula, Z represents a structure selected from the following formulae (z-1) to (z-4); M represents titanium or zirconium; and (RCOO) represents a residue of an aliphatic carboxylic acid having 2 to 25 carbon atoms)
    Type: Application
    Filed: September 9, 2015
    Publication date: September 14, 2017
    Applicants: DIC Corporation, National University Corporation, Iwate University
    Inventors: Shujiro Otsuki, Takayuki Odashima, Hidetoshi Hirahara
  • RUBBER-METAL ADHESION PROMOTER, RUBBER COMPOSITION, AND TIRE
    Publication number: 20170253722
    Abstract: A rubber-metal adhesion promoter characterized by including: a metal salt (1) of a carboxylic acid which is a metal salt of an aliphatic carboxylic acid having 2 to 25 carbon atoms and in which the metal is bismuth, copper, antimony, silver or niobium; or a compound (2) represented by the following general formula (A): [wherein Z represents a structure selected from the following formulae (z-1) to (z-4); M represents bismuth, copper, antimony, silver or niobium; (RCOO) represents a residue of an aliphatic carboxylic acid having 2 to 25 carbon atoms; and x represents the valence of M minus 1].
    Type: Application
    Filed: September 9, 2015
    Publication date: September 7, 2017
    Inventors: Shujiro Otsuki, Takayuki Odashima, Hidetoshi Hirahara