Patents by Inventor Choong-Hoon KIM

Choong-Hoon KIM 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 MANUFACTURING GAS DIFFUSION LAYER FOR FUEL CELL AND GAS DIFFUSION LAYER MANUFACTURED THEREBY
    Publication number: 20240105963
    Abstract: A method for manufacturing a gas diffusion layer for a fuel cell wherein carbon nanotubes are impregnated into Korean paper, thereby enhancing electroconductivity, and a gas diffusion layer manufactured thereby. The method for manufacturing a gas diffusion layer for a fuel cell which is to manufacture a gas diffusion layer as a constituent member of a unit cell in a fuel cell, includes a support preparation step of preparing a support with Korean paper; a dispersion preparation step of dispersing a carbon substance in a solvent to form a dispersion, a coating step of coating the support with the dispersion, and a thermal treatment step of thermally treating the dispersion-coated support to fix the carbon substance to the support.
    Type: Application
    Filed: March 6, 2023
    Publication date: March 28, 2024
    Inventors: Seung Tak Noh, Ji Han Lee, In Seok Lee, Jae Man Park, Won Jong Choi, Choong Hee Kim, Seong Hwang Kim, Jong Hoon Lee, Soo Jin Park, Seul Yi Lee
  • ELECTRONIC DEVICE AND METHOD FOR PROVIDING PAYMENT SERVICE
    Publication number: 20190205863
    Abstract: The present invention relates to an electronic device and, more particularly, to an electronic device and a method for providing a payment service in the electronic device.
    Type: Application
    Filed: September 7, 2017
    Publication date: July 4, 2019
    Inventors: Jun-Kyoung SHIN, Choong-Hoon KIM, Sung-Jun KIM