Patents by Inventor Sung-Kuei Chiang

Sung-Kuei Chiang 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).

  • Phosphorescent material and electroluminescent device using thereof
    Patent number: 6838019
    Abstract: A phosphorescent light emitting material, the material is a complex compound comprises a beta-diketonate ligand, a sulfoxide ligand and a triple charge rare earth group metal ion, the phosphorescent light emitting material has a following structure: wherein M is a triple charge rare earth group metal ion, R2 is hydrogen, R1 and R3 are selected from the group consisting of, hydrogen, C1 to C8 straight chain alkyl groups, C3 to C8 branch chain alkyl groups, heterocyclic groups and C6 to C14 aryl groups, and R4 and R5 are selected from the group consisting of substituted alkyl group, an unsubstituted alkyl group, an aryl group and a heterocyclic group.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: January 4, 2005
    Assignee: Ritek Corporation
    Inventors: Chao-Nan Kuo, Mei-Jung Hu, Sung-Kuei Chiang
  • Dye for optical recording medium
    Publication number: 20040230057
    Abstract: An optical recording medium dye has the following structure (1): 1
    Type: Application
    Filed: April 7, 2004
    Publication date: November 18, 2004
    Inventors: Chao-Nan Kuo, Sung-Kuei Chiang
  • Phosphorescent material
    Publication number: 20030102800
    Abstract: A phosphorescent light emitting material, the material is a complex compound comprises a beta-diketonate ligand, a sulfoxide ligand and a triple charge rare earth group metal ion, the phosphorescent light emitting material has a following structure: 1
    Type: Application
    Filed: August 1, 2002
    Publication date: June 5, 2003
    Inventors: Chao-Nan Kuo, Mei-Jung Hu, Sung-Kuei Chiang