Patents by Inventor Takafumi Numata

Takafumi Numata 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: 9012354
    Abstract: Disclosed is a method for forming a photocatalyst thin film, which is characterized in that a photocatalyst thin film containing a niobium-alkali metal complex oxide is formed by forming and then firing a layer containing a niobia nanosheet on the surface of a base containing an alkali metal.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: April 21, 2015
    Assignee: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Kenichi Katsumata, Yasuhiro Katsumata, Akira Fujishima, Takafumi Numata, Takayoshi Sasaki
  • Patent number: 8445118
    Abstract: A coating liquid including one or more of metal complexes selected from a metal complex A represented by Chemical Formula 1, a metal complex B represented by Chemical Formula 2, and a metal complex C represented by Chemical Formula 3. M in Formula 1, 2 and 3 represents a metal ion. Each of X1-X4 in Formula 1, 2 and 3 is one of O, NH, CO2 and S. Each of Y1-Y8 in Formula 1 and Y1-Y4 in Formula 3 is either CH or N. Each of Z1-Z3 in Formula 2 and 3 and Z4-Z6 in Formula 2 is one selected from a group of O, NH and S, and two selected from a group of CH and N. L represents an axial ligand. k represents a valence of each of the metal complexes and is equal to a sum of electric charges of M, X1-X4 and L.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: May 21, 2013
    Assignee: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Akira Fujishima, Makoto Yamashita
  • Patent number: 8003219
    Abstract: The present invention provides a technology related to a conductive film which is high in transparency, conductivity, and adhesiveness to a base plate. The present invention also provides a coating liquid including metal materials reacting with a ligand represented by a particular Chemical Formula and including indium (In), tin (Sn), or both thereof.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: August 23, 2011
    Assignee: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Makoto Yamashita, Akira Fujishima
  • Patent number: 7993753
    Abstract: The present invention provides a coating liquid including organic metal complexes represented by Chemical Formula 1. R1-R8 in Chemical Formula 1 is one of the followings (1)-(4): (1) a group represented by CnH2n+1 (aforementioned n is an integral number equal to or larger than 0); (2) a group represented by COOR9 (aforementioned R9 is a group represented by CmH2m+1, and aforementioned m is an integral number equal to or larger than 0); (3) a halogen atom; and (4) CN or NO2.
    Type: Grant
    Filed: December 25, 2006
    Date of Patent: August 9, 2011
    Assignee: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Akira Fujishima
  • Patent number: 7964283
    Abstract: The present invention provides a coating liquid including organic metal complexes represented by Chemical Formula 1. R1-R8 in Chemical Formula 1 is one of the followings (1)-(4): (1) a group represented by CnH2n+1 (aforementioned n is an integral number equal to or larger than 0); (2) a group represented by COOR9 (aforementioned R9 is a group represented by CmH2m+1, and aforementioned m is an integral number equal to or larger than 0); (3) a halogen atom; and (4) CN or NO2.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: June 21, 2011
    Assignee: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Akira Fujishima
  • Publication number: 20100317512
    Abstract: Disclosed is a method for forming a photocatalyst thin film, which is characterized in that a photocatalyst thin film containing a niobium-alkali metal complex oxide is formed by forming and then firing a layer containing a niobia nanosheet on the surface of a base containing an alkali metal.
    Type: Application
    Filed: February 8, 2008
    Publication date: December 16, 2010
    Applicant: CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Christopher Cordonier, Tetsuya Shichi, Kenichi Katsumata, Yasuhiro Katsumata, Akira Fujishima, Takafumi Numata, Takayoshi Sasaki
  • Publication number: 20100062281
    Abstract: The present invention provides a technology related to a conductive film which is high in transparency, conductivity, and adhesiveness to a base plate. The present invention also provides a coating liquid including metal materials reacting with a ligand represented by Chemical Formula 1 and including indium (In), tin (Sn), or both thereof. Each of R21—R24 in the Chemical Formula 1 is one of the followings (1)-(11) and X11 and X12 is either hetero atoms or carboxylic acid.
    Type: Application
    Filed: January 31, 2007
    Publication date: March 11, 2010
    Applicant: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Makoto Yamashita, Akira Fujishima
  • Publication number: 20090324963
    Abstract: A coating liquid including one or more of metal complexes selected from a metal complex A represented by Chemical Formula 1, a metal complex B represented by Chemical Formula 2, and a metal complex C represented by Chemical Formula 3. M in Chemical Formula 1, Chemical Formula 2 and Chemical Formula 3 represents a metal ion. Each of X1-X4 in Chemical Formula 1, Chemical Formula 2 and Chemical Formula 3 is one of O, NH, CO2 and S. Each of Y1-Y8 in Chemical Formula 1 and Y1-Y4 in Chemical Formula 3 is either CH or N. Each of Z1-Z3 in Chemical Formula 2 and Chemical Formula 3 and Z4-Z6 in Chemical Formula 2 is one selected from a group of O, NH and S, and two selected from a group of CH and N. L in Chemical Formula 1, Chemical Formula 2 and Chemical Formula 3 represents an axial ligand. k in Chemical Formula 1, Chemical Formula 2 and Chemical Formula 3 represents a valence of each of the metal complexes and is equal to a sum of electric charges of M, X1-X4 and L.
    Type: Application
    Filed: July 12, 2007
    Publication date: December 31, 2009
    Applicant: CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Akira Fujishima, Makoto Yamashita
  • Publication number: 20090169899
    Abstract: The present invention provides a coating liquid including organic metal complexes represented by Chemical Formula 1. R1-R8 in Chemical Formula 1 is one of the followings (1)-(4): (1) a group represented by CnH2n+1 (aforementioned n is an integral number equal to or larger than 0); (2) a group represented by COOR9 (aforementioned R9 is a group represented by CmH2m+1, and aforementioned m is an integral number equal to or larger than 0); (3) a halogen atom; and (4) CN or NO2.
    Type: Application
    Filed: December 15, 2006
    Publication date: July 2, 2009
    Applicant: Central Japan Railway Company
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Akira Fujishima
  • Publication number: 20090075094
    Abstract: The present invention provides a coating liquid including organic metal complexes represented by Chemical Formula 1. R1—R8 in Chemical Formula 1 is one of the followings (1)-(4): (1) a group represented by CnH2n+1 (aforementioned n is an integral number equal to or larger than 0); (2) a group represented by COOR9 (aforementioned R9 is a group represented by CmH2m+1, and aforementioned m is an integral number equal to or larger than 0); (3) a halogen atom; and (4) CN or NO2.
    Type: Application
    Filed: December 25, 2006
    Publication date: March 19, 2009
    Inventors: Christopher Cordonier, Tetsuya Shichi, Takafumi Numata, Kenichi Katsumata, Akimasa Nakamura, Yasuhiro Katsumata, Teruo Komine, Kenichirou Amemiya, Akira Fujishima