Patents by Inventor Makoto Katsumata

Makoto Katsumata 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: 5677009
    Abstract: A metal plated carbon material containing at least one metal chloride compound disposed between graphite layers to form a graphite intercalation compound, and a metal plated layer being formed on a front surface of the metal plated carbon material. A method of producing the metal plated carbon material comprising the steps of immersing a graphite intercalation compound in an electroless plating solution for 6 to 30 hours, and forming a metal plated layer on a surface of the graphite intercalation compound with an excellent adherence thereto.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: October 14, 1997
    Assignee: Yazaki Corporation
    Inventors: Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5556608
    Abstract: In a carbon thread, vapor phase growth carbon fiber (VGCF) are dispersedly contained in a carbon matrix. The carbon thread is produced by forming a thread-like element from a mixture of VGCF and carbonizable carbon-containing compound and then by heat-treating the thread-like element to effect carbonization thereon. The thread-like element may be formed either by melt-spinning or solution-spinning the mixture, or by impregnably adhering the mixture onto a thread of heat resisting fibers. The carbonized carbon thread thus obtained may be subjected to further heat treatment to graphitize the carbon thread.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: September 17, 1996
    Assignee: Yazaki Corporation
    Inventors: Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5556702
    Abstract: A metal plated carbon material containing at least one metal chloride compound disposed between graphite layers to form a graphite intercalation compound, and a metal plated layer being formed on a front surface of the metal plated carbon material. A method of producing the metal plated carbon material comprising the steps of immersing a graphite intercalation compound in an electroless plating solution for 6 to 30 hours, and forming a metal plated layer on a surface of the graphite intercalation compound with an excellent adherence thereto.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: September 17, 1996
    Assignee: Yazaki Corporation
    Inventors: Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5554678
    Abstract: An electromagnetic shielding composite containing a thermosplastic synthetic resin mixed with a metal conductive fiber, low melting point metal, and a vapor-phase grown carbon fiber, which preferably includes, to the total weight of the composite, a thermoplastic synthetic resin of 40-90 weight %, a metal conductive fiber of 0.5-30 weight % and a vapor-phase grown carbon fiber of 0.5-50 weight %.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: September 10, 1996
    Assignee: Yazaki Corporation
    Inventors: Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5504725
    Abstract: In an optical disk apparatus, an optical head is moved in a radial direction of an optical disk having a track spirally or concentrically formed in a state that a groove and a land are adjacent, and detecting device for detecting reflected light from the optical disk, and a track error signal, which is obtained by detecting light from the optical disk along with the movement of the optical head, and a track addition signal are generated, a signal A showing a central position of a groove, a signal C showing a central position of a land, signals B and D showing a groove-land changing position are generated based on the track error signal and the track addition signal, and a direction of the movement of the optical head is detected in accordance with the generation order of the signal A showing a central position of a groove, the signal C showing a central position of a land, and the signals B and D showing a groove-land changing position.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: April 2, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Makoto Katsumata
  • Patent number: 5468918
    Abstract: A conductor member for an electric circuit includes a conductive plastic mold in which carbon fibers or graphite fibers are dispersedly contained, and a metallic layer at least partially plated on the surface of said conductive plastic mold. The conductor member is provided on the surface of an insulating substrate to provide an electric circuit body. Thus, the conductor member for an electric circuit and the electric circuit body can be easily formed in a three-dimensional circuit because of its simple fabrication and excellent processing. Further, the film of metal plating can be made at a high speed and is hard to break because of the intimate contact of the plated metal.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: November 21, 1995
    Assignee: Yazaki Corporation
    Inventors: Toshiaki Kanno, Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5458967
    Abstract: A composite sheet for electromagnetic wave shield is light and excellent in laying operability and in magnetic field shielding property. The composite sheet for electromagnetic wave shield comprises a metal foil and a conductive hot melt resin layer laminated on each other. It is specifically desired that the conductive hot melt resin layer is made of a material in which vapor phase growth carbon fibers of diameters of not more than 1.0 .mu.m and lengths of not more than 50 .mu.m are dispersed in a hot melt resin. The conductive hot melt resin layer may be preferably provided at least on a part of one side of the metal foil.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: October 17, 1995
    Assignee: Yazaki Corporation
    Inventors: Toshiaki Kanno, Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5399330
    Abstract: In a carbon thread, vapor phase growth carbon fiber (VGCF) are dispersedly contained in a carbon matrix. The carbon thread is produced by forming a thread-like element from a mixture of VGCF and carbonizable carbon-containing compound and then by heat-treating the thread-like element to effect carbonization thereon. The thread-like element may be formed either by melt-spinning or solution-spinning the mixture, or by impregnably adhering the mixture onto a thread of heat resisting fibers. The carbonized carbon thread thus obtained may be subjected to further heat treatment to graphitize the carbon thread.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: March 21, 1995
    Assignee: Yazaki Corp.
    Inventors: Makoto Katsumata, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5300553
    Abstract: A method of producing electrically conductive composite. Powdery graphite intercalated compound is dry-mixed with powdery thermosetting plastics to produce a powdery mixture of composition, and then the powdery mixture is compressed, while being heated, to become an electrically conductive composite.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: April 5, 1994
    Assignee: Yazaki Corporation
    Inventors: Hidenori Yamanashi, Makoto Katsumata, Toshiaki Kanno
  • Patent number: 5254409
    Abstract: To provide a conductive resin composite high in conductivity and moldability and low in electric resistance, intercalation compound composed of graphite fiber (having a three-dimensional crystal structure such that hexagonal net planes of carbon are arranged substantially in parallel to a fiber axis and in annular ring growth fashion) and fluorine or transition element fluoride are dispersed in synthetic resin.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: October 19, 1993
    Assignee: Yazaki Corporation
    Inventors: Kiyoshi Yagi, Makoto Katsumata
  • Patent number: 5171938
    Abstract: A shield wire comprising: a conductor, an insulation layer provided around an outer periphery of the conductor; an electrically-conductive resin layer provided around an outer periphery of the insulation layer; a covering insulation layer formed around an outer periphery of the electrically-conductive resin layer; and shield device for shielding the shield cable from electromagnetic interference, the means formed to electrically contact the electrically-conductive resin layer.
    Type: Grant
    Filed: April 17, 1991
    Date of Patent: December 15, 1992
    Assignee: Yazaki Corporation
    Inventors: Makoto Katsumata, Akira Ikegaya, Hidenori Yamanashi, Hitoshi Ushijima
  • Patent number: 5106606
    Abstract: Fluorinated graphite fibers comprising an intercalated compound of graphite fibers, having a three-dimensional crystal structure in which carbon hexagonal network faces are substantially in parallel with the axis of the fibers, and are oriented in a coaxial manner, and fluorine, wherein the length of repeating periods in the direction of the C-axis of the crystals coexist within a range from 5 to 24 .ANG..
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: April 21, 1992
    Assignees: Yazaki Corporation, Mitsubishi Corporation
    Inventors: Morinobu Endo, Yoshio Ohashi, Makoto Katsumata, Hidenori Yamanashi
  • Patent number: 4812138
    Abstract: A connector terminal is disclosed which comprises a base plate having an electrical contact portion at one side and an electrical wire connecting portion at the other side, and a pair of wire barrel members extending upwardly from both edges of the base plate so that a conductor of an electrical wire is crimped by the pair of wire barrel members. A CH CW ratio in the electrical wire pressure contact portion is in the range of 31 to 35%, the CH CW ratio being defined by the following equation: ##EQU1## where CH is the crimp height and CW is the crimp width.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: March 14, 1989
    Assignee: Yazaki Corporation
    Inventors: Hiroki Kondo, Hiroaki Saito, Makoto Katsumata, Michitaka Kinoshita