Patents by Inventor Noriki Fujii

Noriki Fujii 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: 6583221
    Abstract: This invention is related to a vinyl chloride resin as obtainable by graft-copolymerizing an acrylic copolymer (a) having a mean particle diameter of 60 to 250 nm with a vinyl monomer (b) predominantly composed of vinyl chloride, said acrylic copolymer (a) being obtainable by graft-copolymerizing 40 to 90 weight % of a copolymer (a−1) with 10 to 60 weight % of a mixture monomer (a−2), said copolymer (a−1) being composed of 100 weight parts of a radical-polymerizable monomer which gives a homopolymer having a glass transition point of not lower than −140° C. but lower than −60° C. and 0.1 to 1 weight part of a polyfunctional monomer, and said mixture monomer (a−2) comprising 100 weight parts of a radical-polymerizable monomer predominantly comprised of a (meth) acrylate which gives a homopolymer having a glass transition point of not lower than −55° C. but lower than −10° C. and 1.5 to 10 weight parts of a polyfunctional monomer.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: June 24, 2003
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Takahiro Omura, Noriki Fujii
  • Patent number: 4906499
    Abstract: An information signal record medium of an electrostatic capacitance type in which a signal information is recorded as geometric variations is described. The medium is made of a conductive resin composition which comprises a vinyl chloride resin and 5 to 30 parts by weight of conductive particles based on 100 parts by weight of the vinyl chloride resin. The vinyl chloride resin is obtained by polymerizing at least one monomer for the vinyl chloride resin in which from 0.2 to 1 parts by weight of a lubricant per 100 parts by weight of the vinyl chloride resin is dissolved.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: March 6, 1990
    Assignees: Victor Company of Japan, Ltd., Tokuyama Sekisui Industry Corporation, Limited
    Inventors: Toshiaki Hamaguchi, Kazuhira Namikawa, Toshio Akai, Mutsuaki Nakamura, Akio Kuroda, Akio Hata, Noriki Fujii
  • Patent number: 4631717
    Abstract: High density information records formed from conductive resin compositions which comprise a graft polymer obtained by subjecting vinyl chloride monomer to graft polymerization with a copolymer of ethylene and vinyl acetate having a content of vinyl acetate of not less than 35 wt % and a melt index up to 20 and prepared according to a solution polymerization technique. The conductive composition further comprises predetermined amounts of a conductive material and a lubricant of a specific type. The lubricant is an ester between aliphatic acid and alcohol having a hydroxyl value not larger than 15.
    Type: Grant
    Filed: November 26, 1984
    Date of Patent: December 23, 1986
    Assignees: Victor Company of Japan, Ltd., Tokuyama Sekisui Industry Corporation, Limited
    Inventors: Kazuhira Namikawa, Toshiaki Hamaguchi, Mutsuaki Nakamura, Akio Kuroda, Akio Hata, Noriki Fujii
  • Patent number: 4592862
    Abstract: A conductive resin composition comprising a specific type of graft polymer of vinyl chloride and a vinyl chloride/acrylic ester copolymer, and a conductive powder used in an amount of from 10 to 30 wt % of the graft polymer. The conductive composition is particularly useful as video or digital audio discs.
    Type: Grant
    Filed: March 5, 1985
    Date of Patent: June 3, 1986
    Assignees: Victor Company of Japan, Ltd., Tokuyama Sekisui Industry, Corporation Limited
    Inventors: Mutsuaki Nakamura, Kazuhira Namikawa, Toshiaki Hamaguchi, Akio Kuroda, Akio Hata, Noriki Fujii
  • Patent number: 4548739
    Abstract: A high density information record of the electrostatic capacitance type comprising a record substrate on which signal information is recorded as geometric variations. The record substrate is made of a conductive resin composition comprising a vinyl chloride resin and a conductive powder. The vinyl chloride resin is obtained by suspension polymerization of starting vinyl chloride monomer in an aqueous solution of a water-soluble polymer suspension stabilizer from which insoluble organic matters with sizes over 10 .mu.m have been removed.
    Type: Grant
    Filed: April 17, 1984
    Date of Patent: October 22, 1985
    Assignees: Victor Company of Japan, Ltd., Tokuyama Sekisui Industry Corporation, Ltd.
    Inventors: Mutsuaki Nakamura, Kazuhira Namikawa, Toshikazu Goshima, Toshiaki Hamaguchi, Akio Kuroda, Akio Hata, Noriki Fujii
  • Patent number: 4465615
    Abstract: An electroconductive resin composition is a blend of 5-30% by weight carbon black and a graft-polymer. The graft-polymer is obtained by graft polymerizing 99-76 parts by weight of monomeric vinyl chloride to 1-15 parts by weight of an ethylenevinyl acetate copolymer, the ethylenevinyl acetate copolymer containing 10-65% by weight of vinyl acetate. The electroconductive resin composition has superior heat resistance and mechanical strength and improved flowability and heat stability. The electroconductive resin composition is particularly suitable for preparing video disc records.
    Type: Grant
    Filed: April 26, 1983
    Date of Patent: August 14, 1984
    Assignee: Tokuyama Sekisui Kogyo Kabushiki Kaisha
    Inventors: Akio Hata, Hiroshi Kake, Noriki Fujii
  • Patent number: 4396660
    Abstract: An electroconductive resin composition is a blend of 5-30% by weight of carbon black and a graft-polymer. The graft-polymer is obtained by graft-polymerizing 99-76 parts by weight of monomeric vinyl chloride to 1-15 parts by weight of an ethylene-vinyl acetate copolymer, the ethylene-vinyl acetate copolymer containing 10-65% by weight of vinyl acetate. The electroconductive resin composition has superior heat resistance and mechanical strength and improved flowability and heat stability. The electroconductive resin composition is particularly suitable for preparing videodisc records.
    Type: Grant
    Filed: April 13, 1982
    Date of Patent: August 2, 1983
    Assignee: Tokuyama Sekisui Kogyo Kabushiki Kaisha
    Inventors: Akio Hata, Hiroshi Kake, Noriki Fujii