Patents by Inventor Jae-Yeol MA

Jae-Yeol MA 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).

  • METHOD OF PREPARING SYMMETRICAL PHOSPHATE-BASED COMPOUND
    Publication number: 20230399349
    Abstract: The present invention relates to a method of preparing a symmetrical phosphate-based compound. According to the method of the present invention, since a dinucleating agent is used in a hydrophobic solvent under a base-free condition, the yield of a desired compound may be increased due to excellent reaction stability and reduced side reactions.
    Type: Application
    Filed: October 28, 2021
    Publication date: December 14, 2023
    Inventors: Dae Hwan YOO, Jae Yeol MA, Seok Jong LEE, Kwang Ju JUNG, Weon Ju YU
  • Hetero-cyclic compound and organic light emitting device using the same
    Patent number: 10381577
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve the lifetime, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: August 13, 2019
    Assignee: HEESUNG MATERIAL LTD.
    Inventors: Geon-Yu Park, Han-Kook Oh, Yun-Ji Lee, Jae-Yeol Ma, Dong-Jun Kim, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Hetero-cyclic compound and organic light emitting device using the same
    Patent number: 10026908
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve a service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: July 17, 2018
    Assignee: HEESUNG MATERIAL LTD.
    Inventors: Geon-Yu Park, Jae-Yeol Ma, Dong-Jun Kim, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
    Publication number: 20170331052
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve a service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Application
    Filed: May 10, 2017
    Publication date: November 16, 2017
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Geon-Yu PARK, Jae-Yeol MA, Dong-Jun KIM, Jin-Seok CHOI, Dae-Hyuk CHOI, Joo-Dong LEE
  • HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
    Publication number: 20170213988
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve the lifetime, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Application
    Filed: July 27, 2016
    Publication date: July 27, 2017
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Geon-Yu PARK, Han-Kook OH, Yun-Ji LEE, Jae-Yeol MA, Dong-Jun KIM, Jin-Seok CHOI, Dae-Hyuk CHOI, Joo-Dong LEE