Patents by Inventor Munekazu Kawata

Munekazu Kawata 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: 5763091
    Abstract: A transparent, electroconductive ink having therein ultra-fine ITO particles dispersed in a solvent or in a solvent containing a resin dissolved therein is coated and dried on a transparent support, then dried and optionally baked, and thereafter an overcoating liquid consisting essentially of silica sol is coated over the resulting transparent, electroconductive film formed on the support. This is then dried and optionally baked to obtain a transparent, electroconductive substrate having a specific resistance of 0.01 to 0.5 .OMEGA..multidot.cm, a haze value of 0 to 2%, and a volume content of the ultra-fine ITO particles in the film of being 40 to 75%. The substrate has a small surface resistivity and has excellent optical characteristics and weather resistance.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: June 9, 1998
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Munekazu Kawata, Masaya Yukinobu
  • Patent number: 5662962
    Abstract: A transparent, electroconductive ink having therein ultra-fine ITO particles dispersed in a solvent or in a solvent containing a resin dissolved therein is coated and dried on a transparent support, then dried and optionally baked, and thereafter an overcoating liquid consisting essentially of silica sol is coated over the resulting transparent, electroconductive film formed on the support. This is then dried and optionally baked to obtain a transparent, electroconductive substrate having a specific resistance of 0.01 to 0.5 .OMEGA..cm, a haze value of 0 to 2%, and a volume content of the ultra-fine ITO particles in the film of being 40 to 75%. The substrate has a small surface resistivity and has excellent optical characteristics and weather resistance.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: September 2, 1997
    Assignee: Sumitomo Metal Mining Company, Limited
    Inventors: Munekazu Kawata, Masaya Yukinobu
  • Patent number: 5421926
    Abstract: A transparent conductive substrate comprising a base plate member allowing transmission therethrough of visible light, a transparent, overcoat layer formed on the base plate member, and a transparent conductive film which is formed on the overcoat layer, containing ultra-fine particles of indium-tin oxide having a particle size of 0.1 .mu.m or smaller, having light transmittance of 70% or higher and exhibiting surface resistance of 200 .OMEGA./.quadrature. lower. This transparent conductive substrate has low surface resistance and excellent optical characteristics.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: June 6, 1995
    Assignees: Sumitomo Metal Mining Co., Ltd., Tohoku Chemical Industries Co., Ltd.
    Inventors: Masaya Yukinobu, Munekazu Kawata, Yasuo Tsukui
  • Patent number: 5411792
    Abstract: A transparent conductive substrate comprising a base plate member allowing transmission therethrough of visible light, a transparent overcoat layer formed on the base plate member, and a transparent conductive film which is formed on the overcoat layer, containing ultra-fine particles of indium-tin oxide having a particle size of 0.1 .mu.m or smaller, having light transmittance of 70% or higher and exhibiting surface resistance of 200 .OMEGA./.quadrature. or lower. This transparent conductive substrate has low surface resistance and excellent optical characteristics.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: May 2, 1995
    Assignees: Sumitomo Metal Mining Co., Ltd., Tohoku Chemical Industries, Co., Ltd.
    Inventors: Masaya Yukinobu, Munekazu Kawata, Yasuo Tsukui