Patents by Inventor Takehiko Shimamura

Takehiko Shimamura 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).

  • Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements
    Patent number: 7166240
    Abstract: An electroluminescent element in which at least one layer containing at least one of novel hydrocarbon compounds with an anthracene ring and a fluorene ring directly bound is held between a pair of electrodes. The compounds can advantageously be used in a luminescent element and provide an organic electroluminescent element having an excellent luminescent efficiency and a long luminescent life.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: January 23, 2007
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tsutomu Ishida, Takehiko Shimamura, Yoshiyuki Totani, Masakatsu Nakatsuka
  • Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements
    Patent number: 6929870
    Abstract: An electroluminescent element in which at least one layer containing at least one of novel hydrocarbon compounds with an anthracene ring and a fluorene ring directly bound is held between a pair of electrodes. The compounds can advantageously be used in a luminescent element and provide an organic electroluminescent element having an excellent luminescent efficiency and a long luminescent life.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: August 16, 2005
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tsutomu Ishida, Takehiko Shimamura, Yoshiyuki Totani, Masakatsu Nakatsuka
  • Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements
    Publication number: 20050074631
    Abstract: An electroluminescent element in which at least one layer containing at least one of novel hydrocarbon compounds with an anthracene ring and a fluorene ring directly bound is held between a pair of electrodes. The compounds can advantageously be used in a luminescent element and provide an organic electroluminescent element having an excellent luminescent efficiency and a long luminescent life.
    Type: Application
    Filed: September 1, 2004
    Publication date: April 7, 2005
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Tsutomu Ishida, Takehiko Shimamura, Yoshiyuki Totani, Masakatsu Nakatsuka
  • Hydrocarbon compound, material for organic electroluminescent element and organic electroluminescent element
    Publication number: 20030087126
    Abstract: An electroluminescent element in which at least one layer containing at least one of novel hydrocarbon compounds with an anthracene ring and a fluorene ring directly bound is held between a pair of electrodes. The compounds can advantageously be used in a luminescent element and provide an organic electroluminescent element having an excellent luminescent efficiency and a long luminescent life.
    Type: Application
    Filed: April 10, 2002
    Publication date: May 8, 2003
    Inventors: Tsutomu Ishida, Takehiko Shimamura, Yoshiyuki Totani, Masakatsu Nakatsuka