Patents by Inventor Ryuki Hashitani

Ryuki Hashitani 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).

  • Patent number: 6340721
    Abstract: The present invention relates to a flame-retardant resin composition comprising: (A) 60 to 98 wt % of a thermoplastic resin comprising a rubber-reinforced resin; and (B) 40 to 2 wt % of a halogen type flame-retardant which comprises a mixture of compounds, the mixture comprising 5 to 60 mol % of a compound (B-1) having epoxy groups at both terminals of the molecular chain, 15 to 70 mol % of a compound (B-2) having epoxy group at one terminal alone and 5 to 80 mol % of a compound (B-3) having no epoxy group at both terminals.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: January 22, 2002
    Assignee: Techno Polymer Company Limited
    Inventors: Ryuki Hashitani, Takeshi Wakao, Masahiko Noro, Hisao Nagai, Kouji Okada
  • Patent number: 6136901
    Abstract: The present invention relates to a flame-retardant resin composition comprising:(A) 60 to 98 wt % of a thermoplastic resin comprising a rubber-reinforced resin (A-1) obtained by graft polymerizing a monomer component (b) comprising an aromatic vinyl or an aromatic vinyl and other monomer(s) copolymerizable therewith in the presence of a rubber-like polymer (a), a polymer (A-2) obtained by polymerizing the monomer component (b), or a mixture of (A-1) and (A-2); and(B) 40 to 2 wt % of a halogen type flame-retardant which comprises a mixture of compounds, the mixture comprising 5 to 60 mol % of a compound (B-1) having epoxy groups at both terminals of the molecular chain, 15 to 70 mol % of a compound (B-2) having epoxy group at one terminal alone and 5 to 80 mol % of a compound (B-3) having no epoxy group at both terminals.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: October 24, 2000
    Assignee: Techno Polymer Company Limited
    Inventors: Ryuki Hashitani, Takeshi Wakao, Masahiko Noro, Hisao Nagai, Kouji Okada
  • Patent number: 5916936
    Abstract: The present invention provide a flame-retardant resin composition having an extremely low adhesion to metals and excellent thermal stability and light resistance and free from the formation of black extraneous matter. A flame-retardant thermoplastic resin composition characterized by being prepared by incorporating 1 to 1,000 ppm of a basic inorganic compound (D) soluble in a solvent into a resin composition (C) composed of 60 to 98% by weight of a thermoplastic styrene resin (A) and 40 to 2% by weight of a halogenated epoxy flame-retardant (B) having a terminal epoxy group.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: June 29, 1999
    Assignees: Daicel Chemical Industries, Ltd., Techno Polymer Co., Ltd.
    Inventors: Hiroshi Sagane, Ryuki Hashitani