Patents by Inventor Cheolmin Yun

Cheolmin Yun 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).

  • Polyamic acid polymer composite and preparation method thereof
    Patent number: 9278488
    Abstract: The present invention relates to a polyamic acid polymer composite and a method for producing the same, and more specifically, a polyamic acid polymer composite, which can be applied to display substrate production due to its high transparency and low thermal expansion of glass-level, and a method for producing same. The polyamic acid polymer composite comprises 50 to 99 wt % of a polyamic acid polymer having a repeating unit of Chemical Formula 1; and 1 to 50 wt % of a silica-based particle: wherein, R1 to R3, m and n have the same meanings as defined in the specification.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: March 8, 2016
    Assignee: LG CHEM, LTD.
    Inventors: HangAh Park, BoRa Shin, Cheolmin Yun, Kyungjun Kim, JinHo Lee, Jung Ho Jo
  • POLYAMIC ACID POLYMER COMPOSITE AND PREPARATION METHOD THEREOF
    Publication number: 20140316074
    Abstract: The present invention relates to a polyamic acid polymer composite and a method for producing the same, and more specifically, a polyamic acid polymer composite, which can be applied to display substrate production due to its high transparency and low thermal expansion of glass-level, and a method for producing same. The polyamic acid polymer composite comprises 50 to 99 wt % of a polyamic acid polymer having a repeating unit of Chemical Formula 1; and 1 to 50 wt % of a silica-based particle: wherein, R1 to R3, m and n have the same meanings as defined in the specification.
    Type: Application
    Filed: July 3, 2013
    Publication date: October 23, 2014
    Applicant: LG CHEM, LTD.
    Inventors: HangAh Park, BoRa Shin, Cheolmin Yun, Kyungjun Kim, JinHo Lee, Jung Ho Jo