Patents by Inventor Yoshihiko Hashimoto

Yoshihiko Hashimoto 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).

  • Thermoplastic resin composition comprising a vinyl chloride polymer and a graft copolymer
    Patent number: 3994991
    Abstract: A thermoplastic resin composition of vinyl chloride polymer improved in impact strength and weather resistance, which comprises (1) 30 to 97 parts by weight of at least one of vinyl chloride polymers having not less than 70% by weight of vinyl chloride units and (2) 70 to 3 parts by weight of at least one of graft copolymers comprising (2-1) a backbone polymer and (2-2) monomers grafted in two stages thereon in a proportion of 20 : 80 to 80 : 20 by weight, the backbone polymer comprising (2-1-1) units of at least one of alkyl acrylates, of which not more than 20% by weight may be substituted with units of at least one of monovinylic monomers copolymerizable therewith, and (2-1-2) units of at least one of cross-linkable monomers in an amount of 0.
    Type: Grant
    Filed: August 25, 1976
    Date of Patent: November 30, 1976
    Assignee: Kanegafuchi Chemical Industries Co., Ltd.
    Inventors: Shoji Okami, Shigeki Yasunaga, Yoshihiko Hashimoto, Teizo Saito