Patents by Inventor Myeon-Cheon Choi

Myeon-Cheon 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).

  • Diamine compound, and polyamic acid and polyimide using the same
    Patent number: 9783639
    Abstract: Provided are a diamine compound, a polyamic acid and polyimide using the same. The diamine monomer compound is useful for preparing a transparent polyamic acid and polyimide having a high refractive index and a low birefringence.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: October 10, 2017
    Assignee: Pusan National University Industry-University Cooperation Foundation
    Inventors: Chang-Sik Ha, Tapaswi Pradip Kumar, Myeon Cheon Choi, Keuk Min Jeong
  • Novel Diamine Compound, and Polyamic Acid and Polyimide Using the Same
    Publication number: 20170058082
    Abstract: Provided are a diamine compound, a polyamic acid and polyimide using the same. The diamine monomer compound is useful for preparing a transparent polyamic acid and polyimide having a high refractive index and a low birefringence.
    Type: Application
    Filed: December 3, 2015
    Publication date: March 2, 2017
    Inventors: Chang-Sik Ha, Tapaswi Pradip Kumar, Myeon Cheon Choi, Keuk Min Jeong
  • Polyimide nanocomposite and method for preparing same
    Patent number: 8828476
    Abstract: Disclosed is a polyimide nanocomposite, which is prepared by mixing modified graphene oxide, polyamic acid, and a solvent to obtain a mixture solution, and heat-curing the mixture solution.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: September 9, 2014
    Assignee: Pusan National University Industry-University Cooperation Foundation
    Inventors: Chang-Sik Ha, Myeon-Cheon Choi, Gwang-Yeon Kim
  • POLYIMIDE NANOCOMPOSITE AND METHOD FOR PREPARING SAME
    Publication number: 20120328785
    Abstract: Disclosed is a polyimide nanocomposite, which is prepared by mixing modified graphene oxide, polyamic acid, and a solvent to obtain a mixture solution, and heat-curing the mixture solution.
    Type: Application
    Filed: September 6, 2012
    Publication date: December 27, 2012
    Applicant: Pusan National University Industry-University Cooperation Foundation
    Inventors: Chang-Sik Ha, Myeon-Cheon Choi, Gwang-Yeon Kim