Patents by Inventor So-Hyun JANG

So-Hyun JANG 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 for preparing spiro quaternary ammonium salt
    Patent number: 10093677
    Abstract: The present invention relates to a method for preparing a spiro quaternary ammonium salt comprising reacting a cyclic secondary amine with a dihaloalkane in the presence of a basic resin. According to the preparation method of the present invention, a metal salt and halide ion are removed by filtration without any additional purification process, the spiro ammonium derivative compound can be obtained with high yield, and the resin can be reused through a simple treatment process.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 9, 2018
    Assignee: SAMHWA PAINTS INDUSTRIES CO., LTD.
    Inventors: Myeng Chan Hong, Young Seop Choi, Seung Hun Lee, Da Eun Kwon, So Hyun Jang, June Hyeop An, Chong Yun Kwag
  • METHOD FOR PREPARING SPIRO QUATERNARY AMMONIUM SALT
    Publication number: 20180186804
    Abstract: The present invention relates to a method for preparing a spiro quaternary ammonium salt comprising reacting a cyclic secondary amine with a dihaloalkane in the presence of a basic resin. According to the preparation method of the present invention, a metal salt and halide ion are removed by filtration without any additional purification process, the spiro ammonium derivative compound can be obtained with high yield, and the resin can be reused through a simple treatment process.
    Type: Application
    Filed: April 18, 2017
    Publication date: July 5, 2018
    Applicant: SAMHWA PAINTS INDUSTRIES CO., LTD.
    Inventors: Myeng Chan HONG, Young Seop CHOI, Seung Hun LEE, Da Eun KWON, So Hyun JANG, June Hyeop AN, Chong Yun KWAG
  • POLYCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
    Publication number: 20160204357
    Abstract: Disclosed are a novel polycyclic compound and an organic light emitting device using the same.
    Type: Application
    Filed: June 29, 2015
    Publication date: July 14, 2016
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: So-Hyun JANG, Kee-Yong KIM, Jin-Seok CHOI, Dae-Hyuk CHOI, Sung-Jin EUM, Joo-Dong LEE