Patents by Inventor Wang Guofang

Wang Guofang 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).

  • Cyclic tertiary amine compound and organic electroluminescent device containing the compound
    Patent number: 6936189
    Abstract: A cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device are disclosed. Use of the cyclic tertiary amine compound as a hole transport material, a hole injection material or an organic electroluminescent material can provide organic EL devices having high luminous efficiency and a long service life.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: August 30, 2005
    Assignee: Chisso Corporation
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa
  • Cyclic tertiary amine compound and organic electroluminescent device containing the compound
    Publication number: 20040170866
    Abstract: The present invention relates to a cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 2, 2004
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa
  • Cyclic tertiary amine compound and organic electroluminescent device containing the compound
    Patent number: 6761981
    Abstract: A cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device are disclosed. Use of the cyclic tertiary amine compound as a hole transport material, a hole injection material or an organic electroluminescent material can provide organic EL devices having high luminous efficiency and a long service life.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: July 13, 2004
    Assignee: Chisso Corporation
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa
  • Cyclic tertiary amine compound and organic electroluminescent device containing the compound
    Publication number: 20020058155
    Abstract: The present invention relates to a cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device.
    Type: Application
    Filed: September 26, 2001
    Publication date: May 16, 2002
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa