Patents by Inventor Dinesh Kumar Rayabarapu

Dinesh Kumar Rayabarapu 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 light emitting diode containing a novel Ir complex as a phosphorescent emitter
    Patent number: 7320834
    Abstract: A phosphorescent Ir complex having the following structures (I) or (II) is used as an emitter in an organic light emitting diode (OLED): wherein X is an arbitrary monoanionic bidentate ligand; Z is an arbitrary moiety constituting a nitrogen-containing heterocyclic group; R1 is a substituent on the nitrogen-containing heterocyclic group; m is 0 or a positive integer; R2 and R3 independently are H, halogen, C1-C6 alkyl, a halogen-substituted C1-C6 alkyl, C1-C6 alkoxy, phenyl C1-C6 alkyl, amino, aryl, heterocyclic aryl substituent.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: January 22, 2008
    Assignee: National Tsing Hua University
    Inventors: Chien-Hong Cheng, Jiun-Pey Duan, Dinesh Kumar Rayabarapu, Betty Marie Jennifer. S. P.