Patents by Inventor Mayumi Sunako

Mayumi Sunako 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).

  • Polyester resin composition, process for production of same, and film
    Patent number: 8889819
    Abstract: A method for producing a polyester resin composition includes conducting polyconensation via esterification or transesterification, wherein an alkali metal phosphate in an amount of 1.3 mol/ton to 3.0 mol/ton and phosphoric acid in an amount of 0.4 to 1.5 times (by mole) that of the alkali metal phosphate are added at a stage between the point of time when the esterication or transesterification has been substantially completed and the point of time when the intrinsic viscosity reaches 0.4. A polyester resin composition obtained by the process exhibits excellent long-term hydrolysis resistance and excellent mechanical characteristics.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: November 18, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Hiroji Kojima, Jun Sakamoto, Mayumi Sunako
  • POLYESTER RESIN COMPOSITION, PROCESS FOR PRODUCTION OF SAME, AND FILM
    Publication number: 20110313102
    Abstract: A method for producing a polyester resin composition includes conducting polycondensation via esterification or transesterification, wherein an alkali metal phosphate in an amount of 1.3 mol/ton to 3.0 mol/ton and phosphoric acid in an amount of 0.4 to 1.5 times (by mole) that of the alkali metal phosphate are added at a stage between the point of time when the esterication or transesterification has been substantially completed and the point of time when the intrinsic viscosity reaches 0.4. A polyester resin composition obtained by the process exhibits excellent long-term hydrolysis resistance and excellent mechanical characteristics.
    Type: Application
    Filed: March 1, 2010
    Publication date: December 22, 2011
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Hiroji Kojima, Jun Sakamoto, Mayumi Sunako