Patents by Inventor Shinsuke Sakata

Shinsuke Sakata 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).

  • Tetrafluoroethylene/hexafluoropropylene copolymer having improved extrudability
    Patent number: 4552925
    Abstract: Mixture of tetrafluoroethylene/hexafluoropropylene (TFE/HFP) copolymers comprising 5 to 20% by weight of hexafluoropropylene, the specific melt viscosity at 380.degree. C. of which is from 1.times.10.sup.4 to 60.times.10.sup.4 poise,(a) the melt flow ratio being at least 3.5, and(b) the zero strength time (ZST, second) at 380.degree. C. satisfying the following equation:ZST.gtoreq.1/3x.sup.2 +17x+107wherein x is (specific melt viscosity).times.10.sup.-4 having an improved extrudability, particularly an improved extrusion speed. These mixtures of copolymers contain a high specific melt viscosity portion and a low specific melt viscosity portion.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: November 12, 1985
    Assignee: Daikin Kogyo Co., Ltd.
    Inventors: Shinichi Nakagawa, Kohzoh Asano, Shinsuke Sakata, Tokio Adachi, Shoji Kawachi