Patents by Inventor Takanori Kajioka

Takanori Kajioka 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).

  • Organic EL devices and production process thereof
    Patent number: 7357992
    Abstract: An organic electroluminescent device comprising a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a mixture of a hole-transporting material consisting of a tertiary amine compound, an electron-transporting material and a light-emitting additive material, in which the tertiary amine compound has two or more oxidation potentials determined by a cyclic voltammetry wherein a potential difference between the first oxidation potential and the second oxidation potential in the oxidation potentials is 0.22V or more, and a glass transition temperature of at least 100° C., and the electron-transporting material has a glass transition temperature of at least 100° C.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: April 15, 2008
    Assignee: Denso Corporation
    Inventors: Tetsuya Kato, Kazushige Kojima, Takanori Kajioka, Masahiko Ishii
  • Organic EL devices and production process thereof
    Publication number: 20050064237
    Abstract: An organic electroluminescent device comprising a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a mixture of a hole-transporting material consisting of a tertiary amine compound, an electron-transporting material and a light-emitting additive material, in which the tertiary amine compound has two or more oxidation potentials determined by a cyclic voltammetry wherein a potential difference between the first oxidation potential and the second oxidation potential in the oxidation potentials is 0.22V or more, and a glass transition temperature of at least 100° C., and the electron-transporting material has a glass transition temperature of at least 100° C.
    Type: Application
    Filed: May 25, 2004
    Publication date: March 24, 2005
    Inventors: Tetsuya Kato, Kazushige Kojima, Takanori Kajioka, Masahiko Ishii