Patents Assigned to Sumito Chemical Company, Limited
  • Polymeric fluorescent substance and polymer light emitting device
    Patent number: 6984459
    Abstract: Provided is a polymeric fluorescent substance containing specific proportion of a repeating unit comprising 2 to 5 arylene groups or heterocyclic compound groups. The polymeric fluorescent substance has strong fluorescence, and can be suitably used as a polymer for high performance polymer LED and a dye for laser.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: January 10, 2006
    Assignee: Sumito Chemical Company, Limited
    Inventors: Takanobu Noguchi, Shuji Doi, Makoto Kitano