Patents by Inventor Jakka Kavitha

Jakka Kavitha 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).

  • Pt complexes as phosphorescent emitters in the fabrication of organic light emitting diodes
    Patent number: 7002013
    Abstract: A series of Pt(II) complexes having the following formula are disclosed: X1 and X2 independently are C or N, X1 can also locate at another position of the hexagonal ring, when X1 is N; R1 is H, C1–C8 alkyl, or C1–C4 perfluoroalkyl, R2 is H, R1 and R2 together are C4–C8 alkylene, or R1 and R2 together are bridged carbocyclic C4–C12 alkylene, when X2 is C; R1 is H, C1–C8 alkyl, or C1–C4 perfluoroalkyl, and R2 is omitted, when X2 is N; R7 is H or methyl, and R8 is omitted, when X1 is N; R7 is H or methyl, R8 is H or methyl, or R7 and R8 together are when X1 is C.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: February 21, 2006
    Assignee: National Tsing Hua University
    Inventors: Yun Chi, Pi-Tai Chou, Sheng-Yuan Chang, Jakka Kavitha, Yu-Tai Tao