Patents by Inventor Yuhei Kasahara

Yuhei Kasahara 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).

  • Artificial hair fiber having shape memory and shape restoration function, artificial hair fiber having excellent flame resistance, and artificial hair fiber having low gloss appearance
    Patent number: 9756886
    Abstract: Artificial hair fiber having shape memory and shape restoration function, artificial hair fiber having excellent flame resistance, and artificial hair fiber having low gloss appearance are provided. Provided is an artificial hair fiber including a resin composition including at least one polyamide, the artificial hair fiber satisfying at least one of constitutions (1) to (3): (1) the fiber has a modulus of elasticity of 2400 to 3000 N/mm2; (2) the polyamide has a weight average molecular weight Mw of 6.5×104 to 15×104 and the fiber has a modulus of elasticity of 500 to 15000 N/mm2; (3) the fiber has a modulus of elasticity of 500 to 15000 N/mm2 and the resin composition contains 5 to 20 parts by mass of fine particles with respect to 100 parts by mass of the polyamide.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: September 12, 2017
    Assignee: Denka Company Limited
    Inventors: Tomohiro Kimura, Yudai Ogawa, Yuhei Kasahara, Atsushi Horihata
  • ARTIFICIAL HAIR FIBER HAVING SHAPE MEMORY AND SHAPE RESTORATION FUNCTION, ARTIFICIAL HAIR FIBER HAVING EXCELLENT FLAME RESISTANCE, AND ARTIFICIAL HAIR FIBER HAVING LOW GLOSS APPEARANCE
    Publication number: 20160255894
    Abstract: Artificial hair fiber having shape memory and shape restoration function, artificial hair fiber having excellent flame resistance, and artificial hair fiber having low gloss appearance are provided. Provided is an artificial hair fiber including a resin composition including at least one polyamide, the artificial hair fiber satisfying at least one of constitutions (1) to (3): (1) the fiber has a modulus of elasticity of 2400 to 3000 N/mm2; (2) the polyamide has a weight average molecular weight Mw of 6.5×104 to 15×104 and the fiber has a modulus of elasticity of 500 to 15000 N/mm2; (3) the fiber has a modulus of elasticity of 500 to 15000 N/mm2 and the resin composition contains 5 to 20 parts by mass of fine particles with respect to 100 parts by mass of the polyamide.
    Type: Application
    Filed: October 9, 2014
    Publication date: September 8, 2016
    Applicant: Denka Company Limited
    Inventors: Tomohiro Kimura, Yudai Ogawa, Yuhei Kasahara, Atsushi Horihata