Patents by Inventor X. Charles Li

X. Charles Li 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 photoluminescent polymers with improved stability
    Patent number: 6936355
    Abstract: A luminescent polymer, suitable for use in an active layer of an organic light-emitting device, organic solid state lasers, a photovoltaic cell or an electrochromic display and exhibiting good stability and microstructure control, which has the structure wherein Ar1 and Ar2 are aromatic or heteroaromatic rings, such as phenyl, biphenyl, fluorene, thiophene, pyridyl, or their substituted aromatic or heteroaromatic rings with or without deuterium, and R1 and R2 are independently each selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted alkyl, alkoxyl, aryl and heteroaryl, or halogen, wherein D represents deuterium and n is an integer greater than 3. Electronic devices and methods of making them which employ these luminescent polymers are also described.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: August 30, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: X. Charles Li, Kazunori Ueno, Bing R. Hsieh
  • Organic photoluminescent polymers with improved stability
    Publication number: 20030227001
    Abstract: A luminescent polymer, suitable for use in an active layer of an organic light-emitting device, organic solid state lasers, a photovoltaic cell or an electrochromic display and exhibiting good stability and microstructure control, which has the structure 1
    Type: Application
    Filed: June 4, 2002
    Publication date: December 11, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: X. Charles Li, Kazunori Ueno, Bing R. Hsieh