Patents by Inventor Yuichiro Miyahara

Yuichiro Miyahara 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).

  • Polyarylene sulfide copolymer and method of producing the same
    Patent number: 11440997
    Abstract: A polyarylene sulfide copolymer has a glass transition temperature of 95° C. or higher and 190° C. or lower and has a melting point of 300° C. or lower or does not have a melting point, as measured by differential scanning calorimetry, and the copolymer containing as a structural unit arylene sulfide units having a number average molecular weight (Mn) of 1,000 or more and 10,000 or less. The polyarylene sulfide copolymer can be provided with high physical stability such as in rigidity at high temperature and excellent moldability and chemical resistance.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: September 13, 2022
    Assignee: Toray Industries, Inc.
    Inventors: Yuichiro Miyahara, Yuji Yamanaka, Takeshi Unohara