Patents by Inventor Hiromitsu Sai

Hiromitsu Sai 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).

  • Polyethylene terephthalate resin composition and film formed from same
    Patent number: 10774178
    Abstract: A polyethylene terephthalate resin composition which is characterized by having a manganese element content of 30 to 60 ppm, a potassium element content of 2 to 10 ppm, an antimony element content of 70 to 150 ppm, a molar ratio of metal elements to phosphorus element (M/P=(M1+M2/2)/P) satisfying formula (1), and a gelation ratio of 5% by weight or less: 0.6?(M1+M2/2)/P?1.3??(1) wherein M1 represents the content (mol/t) of a bivalent metal element selected from the group consisting of Mg, Mn, and Ca; M2 represents the content (mol/t) of a monovalent metal element selected from the group consisting of Li, Na, and K; and P represents the content (mol/t) of phosphorus element.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: September 15, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Susumu Fujiwara, Hiromitsu Sai, Hitoshi Yoshimura, Yoshiki Kamigaito
  • POLYETHYLENE TEREPHTHALATE RESIN COMPOSITION AND FILM FORMED FROM SAME
    Publication number: 20180319977
    Abstract: A polyethylene terephthalate resin composition which is characterized by having a manganese element content of 30 to 60 ppm, a potassium element content of 2 to 10 ppm, an antimony element content of 70 to 150 ppm, a molar ratio of metal elements to phosphorus element (M/P=(M1+M2/2)/P) satisfying formula (1), and a gelation ratio of 5% by weight or less: 0.6?(M1+M2/2)/P?1.3??(1) wherein M1 represents the content (mol/t) of a bivalent metal element selected from the group consisting of Mg, Mn, and Ca; M2 represents the content (mol/t) of a monovalent metal element selected from the group consisting of Li, Na, and K; and P represents the content (mol/t) of phosphorus element.
    Type: Application
    Filed: October 17, 2016
    Publication date: November 8, 2018
    Inventors: Susumu Fujiwara, Hiromitsu Sai, Hitoshi Yoshimura, Yoshiki Kamigaito