Patents by Inventor Jung Dae Choi

Jung Dae Choi 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 aliphatic diisocyanate
    Patent number: 8927763
    Abstract: The present invention relates to a method for preparing an aliphatic diisocyanate by pyrolyzing an aliphatic dicarbamate in liquid phase, using a tin (II) or (IV) compound as a catalyst and a zwitterionic compound as a stabilizer, thereby remarkably inhibiting high-boiling by-products and providing the aliphatic diisocyanate with high yield.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: January 6, 2015
    Assignee: University-Industry Cooperation Group of Kyung Hee University
    Inventors: Hoon Sik Kim, Heehwan Kim, Ji Young Oh, Seunghoon Shin, Seok Soo Kim, Kyung Sik Lim, Jung Dae Choi
  • METHOD FOR PREPARING ALIPHATIC DIISOCYANATE
    Publication number: 20140303399
    Abstract: The present invention relates to a method for preparing an aliphatic diisocyanate by pyrolyzing an aliphatic dicarbamate in liquid phase, using a tin (II) or (IV) compound as a catalyst and a zwitterionic compound as a stabilizer, thereby remarkably inhibiting high-boiling by-products and providing the aliphatic diisocyanate with high yield.
    Type: Application
    Filed: December 4, 2012
    Publication date: October 9, 2014
    Applicant: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Hoon Sik Kim, Heehwan Kim, Ji Young Oh, Seunghoon Shin, Seok Soo Kim, Kyung Sik Lim, Jung Dae Choi