Patents by Inventor Takuya Tomura

Takuya Tomura 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: 11189393
    Abstract: A conductive coated composite body is disclosed which has both good adhesion of a conductive coating film to a base and excellent electrical conductivity of the conductive coating film at the same time even in cases where a glass base or a base having low heat resistance is used; and a method for producing this conductive coated composite body. A conductive coated composite body includes: a base; a resin layer that is formed on at least a part of the base; and a conductive coating film that is formed on at least a part of the resin layer. The conductive coating film is a sintered body of silver fine particles; the main component of the resin layer is a polyurethane resin having an elongation at break of 600% or more; and the polyurethane resin has one of the functional groups represented by —COO—H, —COOR, —COO?NH+R2 and —COO?NH4+.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: November 30, 2021
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuya Tomura, Yuki Shingai
  • Patent number: 10427251
    Abstract: Provided are a fine silver particle dispersion which exhibits low temperature sinterability and in which fine silver particles are uniformly dispersed in a variety of solvents (and especially highly polar solvents); fine silver particles that exhibit low temperature sinterability and excellent dispersion stability in a variety of solvents (and especially highly polar solvents); a dispersion obtained using the fine silver particles; and a method for producing same. The fine silver particle dispersion is characterized by containing fine silver particles, a short chain amine having 5 or fewer carbon atoms, and a highly polar solvent and in that the partition coefficient (log P) of the short chain amine is ?1.0 to 1.4.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: October 1, 2019
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki Shingai, Takuya Tomura
  • Publication number: 20180114609
    Abstract: A conductive coated composite body is disclosed which has both good adhesion of a conductive coating film to a base and excellent electrical conductivity of the conductive coating film at the same time even in cases where a glass base or a base having low heat resistance is used; and a method for producing this conductive coated composite body. A conductive coated composite body includes: a base; a resin layer that is formed on at least a part of the base; and a conductive coating film that is formed on at least a part of the resin layer. The conductive coating film is a sintered body of silver fine particles; the main component of the resin layer is a polyurethane resin having an elongation at break of 600% or more; and the polyurethane resin has one of the functional groups represented by —COO—H, —COOR, —COO?NH+R2 and —COO?NH4+.
    Type: Application
    Filed: February 19, 2016
    Publication date: April 26, 2018
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuya Tomura, Yuki Shingai
  • Patent number: 9783708
    Abstract: An conductive paste comprises inorganic particles having alkylamine with 6 or less of carbon number on at least a portion of a surface, a polymer dispersant having a pigment affinity group in a main chain and/or a plurality of side chains, and, that comprising a polymer with a comb structure having a plurality of side chains constituting a solvation portion, a polymer having a plurality of pigment affinity portions made from a pigment affinity group in the main chain or a straight-chain polymer having a pigment affinity portion made from a pigment affinity group in one terminal of the main chain, a dispersion medium, wherein a weight reduction percentage at the time of heating solid content of the conductive paste from room temperature to 500° C. by thermal analysis is 15% by weight or less.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: October 10, 2017
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Miki Matsui, Takuya Tomura, Tomofumi Watanabe, Kenji Shimoyama
  • Publication number: 20170120394
    Abstract: Provided are a fine silver particle dispersion which exhibits low temperature sinterability and in which fine silver particles are uniformly dispersed in a variety of solvents (and especially highly polar solvents); fine silver particles that exhibit low temperature sinterability and excellent dispersion stability in a variety of solvents (and especially highly polar solvents); a dispersion obtained using the fine silver particles; and a method for producing same. The fine silver particle dispersion is characterized by containing fine silver particles, a short chain amine having 5 or fewer carbon atoms, and a highly polar solvent and in that the partition coefficient (log P) of the short chain amine is ?1.0 to 1.4.
    Type: Application
    Filed: June 4, 2015
    Publication date: May 4, 2017
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki Shingai, Takuya Tomura
  • Publication number: 20150232709
    Abstract: An conductive paste comprises inorganic particles having alkylamine with 6 or less of carbon number on at least a portion of a surface, a polymer dispersant having a pigment affinity group in a main chain and/or a plurality of side chains, and, that comprising a polymer with a comb structure having a plurality of side chains constituting a solvation portion, a polymer having a plurality of pigment affinity portions made from a pigment affinity group in the main chain or a straight-chain polymer having a pigment affinity portion made from a pigment affinity group in one terminal of the main chain, a dispersion medium, wherein a weight reduction percentage at the time of heating solid content of the conductive paste from room temperature to 500° C. by thermal analysis is 15% by weight or less.
    Type: Application
    Filed: August 5, 2013
    Publication date: August 20, 2015
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Miki Matsui, Takuya Tomura, Tomofumi Watanabe, Kenji Shimoyama
  • Publication number: 20100126379
    Abstract: The electrically conductive ink in accordance with one embodiment of the present invention includes a metal colloid liquid and a saccharide compound, wherein the electrically conductive ink comprises the saccharide compound in an amount equivalent to at least 3% by weight and at a maximum 15% by weight of a solid content of the metal colloid liquid. This way, it is possible to provide an electrically conductive ink making it possible to form an electrically conductive film having a high electrical conductivity and a high adhesiveness to a substrate, to provide an electrically conductive film made from the electrically conductive ink, as well as to provide a production method of the electrically conductive ink and a production method of the electrically conductive film.
    Type: Application
    Filed: April 8, 2008
    Publication date: May 27, 2010
    Inventors: Takuya Tomura, Mitsuru Yamada
  • Publication number: 20040119045
    Abstract: The present invention has for its object to provide a magnetorheological fluid having good dispersion stability and freedom from an unwanted increase in viscosity.
    Type: Application
    Filed: January 16, 2004
    Publication date: June 24, 2004
    Inventors: Katsuhiko Hata, Takuya Tomura