Patents by Inventor Junichi Ishll

Junichi Ishll 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).

  • Electroluminescent polymer, bisfluorenylsilane compound and organic electroluminescent element
    Patent number: 7135242
    Abstract: An electroluminescent polymer which has repeating units represented by formula (1) is obtained by polymerizing a bisfluorenylsilane compound which has specified substituent groups. In spite of the fact that this electroluminescent polymer is a ?-? conjugated type fluorene polymer, the deterioration in the color purity of EL caused by excimer formation is suppressed, so that the color purity of blue emitted light in particular is extremely high. This electroluminescent polymer is extremely useful as a light-emitting material in organic electroluminescent elements.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: November 14, 2006
    Assignees: Sony Corporation, Sony Chemical & Information Device Corporation
    Inventors: Tomoyasu Sunaga, Junichi Ishll, Susumu Yanagibori, Miyuki Tsukioka