Patents by Inventor Sang-Gook Jung

Sang-Gook Jung 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).

  • Processes for preparing of 3,4-alkylenedioxythiophenes and 3,4-dialkoxythiophenes
    Patent number: 7202369
    Abstract: The present invention relates to a process for preparing 3,4-dialkoxythiophenes or 3,4-alkylenedioxythiophenes in high yield via the rapid decarboxylation of 3,4-dialkoxythiophenedicarboxylic acid or 3,4-aklylenedioxythiophenedicarboxylic acid in a water-miscible polar solvent in the presence of copper catalyst under an oxygen atmosphere.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: April 10, 2007
    Inventors: Woon-Phil Baik, Young-Sam Kim, Hee-Jung Hong, Sang-Gook Jung
  • Processes for preparing conductive macromolecular polythiophenes
    Patent number: 7034104
    Abstract: The present invention relates to a process for preparing polythiophenes comprised of unit structures of the general formula 1: where R1 and R2 independently represent hydrogen or a C1˜C4 alkyl group, or together represent an optionally substituted C1˜C4 alkylene group, preferably an optionally alkyl-substituted methylene group, an optionally C1˜C4 alkyl- or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group. More specifically, the process according to the present invention is characterized by the fact that it is performed by cationic polymerization from 2,5-dihalothiophene in the presence of an acid catalyst, such as Lewis acid, protic acid, oxygen acid, or polymeric acid. The conductivity of the resulting polythiophene is 255 S/cm under optimal conditions.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: April 25, 2006
    Assignees: Myongji University
    Inventors: Woon-Phil Baik, Young-Sam Kim, Jae-Han Park, Sang-Gook Jung
  • Processes for preparing conductive macromolecular polythiophenes
    Publication number: 20040171790
    Abstract: The present invention relates to a process for preparing polythiophenes comprised of unit structures of the general formula 1: 1
    Type: Application
    Filed: December 5, 2003
    Publication date: September 2, 2004
    Applicant: Myongji University
    Inventors: Woon-Phil Baik, Young-Sam Kim, Jae-Han Park, Sang-Gook Jung
  • Processes for preparing of 3,4-alkylenedioxythiophenes and 3,4-dialkoxythiophenes
    Publication number: 20040147765
    Abstract: The present invention relates to a process for preparing 3,4-dialkoxythiophenes or 3,4-alkylenedioxythiophenes in high yield via the rapid decarboxylation of 3,4-dialkoxythiophenedicarboxylic acid or 3,4-aklylenedioxythiophenedicarboxylic acid in a water-miscible polar solvent in the presence of copper catalyst under an oxygen atmosphere.
    Type: Application
    Filed: November 19, 2003
    Publication date: July 29, 2004
    Applicants: Woon-Phil BAIK, Myongji University
    Inventors: Woon-Phil Baik, Young-Sam Kim, Hee-Jung Hong, Sang-Gook Jung