Patents by Inventor Hiroya Kakegawa

Hiroya Kakegawa 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: 7049362
    Abstract: A resin molded product is provided which exhibits a higher level of electrical conductivity and particularly a lower level of surface resistance than those generally expected from the content of an electrically conductive filler. The resin molded product comprises a matrix of a resin material and an electrically conductive filler dispersed in the matrix, wherein a content of the electrically conductive filler is lower than 20 wt %, and the resin molded product has been subjected to a voltage application process employing a voltage of not lower than 20 kV and lower than a dielectric breakdown voltage of the matrix. The electrically conductive filler is, for example, a fibrous filler such as a fibrous carbon filler or a fibrous graphite filler, and has an average fiber diameter of, for example, 0.002 to 15 ?m. The resin molded product typically contains a coloring material dispersed in the matrix together with the electrically conductive filler, and exhibits a color corresponding to the coloring material.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: May 23, 2006
    Assignee: Osaka Gas Co.,Ltd.
    Inventor: Hiroya Kakegawa
  • Publication number: 20050004269
    Abstract: A resin molded product is provided which exhibits a higher level of electrical conductivity and particularly a lower level of surface resistance than those generally expected from the content of an electrically conductive filler. The resin molded product comprises a matrix of a resin material and an electrically conductive filler dispersed in the matrix, wherein a content of the electrically conductive filler is lower than 20 wt %, and the resin molded product has been subjected to a voltage application process employing a voltage of not lower than 20 kV and lower than a dielectric breakdown voltage of the matrix. The electrically conductive filler is, for example, a fibrous filler such as a fibrous carbon filler or a fibrous graphite filler, and has an average fiber diameter of, for example, 0.002 to 15 ?m. The resin molded product typically contains a coloring material dispersed in the matrix together with the electrically conductive filler, and exhibits a color corresponding to the coloring material.
    Type: Application
    Filed: November 1, 1999
    Publication date: January 6, 2005
    Inventor: Hiroya Kakegawa
  • Patent number: 5889081
    Abstract: This invention provides: (1) a hinder composition for friction materials, characterized in that it comprises a thermosetting resin and a specific organic silicon compound having phenyl groups, and (2) a friction material having as a binder composition shown in the above item (1). When used for manufacturing friction materials in the brakes and clutches for various kinds of vehicles such as automobiles, it can remarkably improve the facing and abrasion resistances of the friction material.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: March 30, 1999
    Assignee: Osaka Gas Company Limited
    Inventors: Hiroya Kakegawa, Tokugen Yasuda, Xiangsheng Wang
  • Patent number: 5017431
    Abstract: An adhesive made from a thermosetting resin composition consisting of (a) a condensed polycyclic aromatic compound, (b) an aromatic crosslinking agent and (c) an acid catalyst is applied to each surface of adherends treated with a particular surface treating agent and heated at a temperature of 100.degree.-400.degree. C. in an oxidizing or non-oxidizing atmosphere to produce an adhesion structure. In order to provide a conductive adhesion structure, a conductive promotion catalyst is included in the adhesive. Further, a carbonaceous or graphitic adhesion structure is obtained by carbonization or graphitization of the adhesion structure.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: May 21, 1991
    Assignee: Ibiden Company, Ltd.
    Inventors: Sugio Otani, Hiroya Kakegawa
  • Patent number: 4911983
    Abstract: An adhesive made from a thermosetting resin composition consisting of (a) a condensed polycyclic aromatic compound, (b) an aromatic crosslinking agent and (c) an acid catalyst is applied to each surface of adherends treated with a particular surface treating agent and heated at a temperature of 100.degree.-400.degree. C. in an oxidizing or non-oxidizing atmosphere to produce an adhesion structure. In order to provide a conductive adhesion structure, a conductive promotion catalyst is included in the adhesive. Further, a carbonaceous or graphitic adhesion structure is obtained by carbonization or graphitization of the adhesion structure.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: March 27, 1990
    Assignee: Ibiden Company, Ltd.
    Inventors: Sugio Otani, Hiroya Kakegawa