Patents by Inventor Hiroki Imakura

Hiroki Imakura 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).

  • Plastic zipper improved in durability
    Patent number: 6539594
    Abstract: A plastic zipper including a male hook and a pair of female hooks that are engaged with each other to form a combination thereof. In the plastic zipper, when an opening force is applied to the plastic zipper from an opening side thereof, the pair of female hooks is provided on a flange, a portion of which, being defined by base portions of two female hooks on an opening and content side, becomes flexible. The plastic zipper is favorably used for containers for packaging, since it permits resistance to opening on the opening side to consistently hold a low value of from about 0.9 kg/5 cm to about 1.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: April 1, 2003
    Assignee: Show Highpolymer Co., Ltd.
    Inventors: Juichi Kasai, Hiroki Imakura
  • Resin compositions of high adhesivity comprising E/VA copolymer, chlorinated or chlorosulfonated polyethylene, an unsaturated acid and a peroxy compound
    Patent number: 3934056
    Abstract: Resin compositions of high adhesivity which comprise (A) ethylene-vinylacetate copolymer or mixture of said copolymer with polyethylene, (B) chlorinated or chlorosulfonated polyethylene, (C) unsaturated carboxylic acids maintaining solid at room temperature and (D) organic peroxides or these components blended with phenolic compounds and/or acid-acceptors.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: January 20, 1976
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Masaharu Yoshida, Shigenobu Ishihara, Tsuyoshi Takahashi, Hiroki Imakura