Patents by Inventor Gee Woo CHANG

Gee Woo CHANG 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).

  • MANUFACTURING METHOD OF SECONDARY BATTERY
    Publication number: 20240136492
    Abstract: A method for manufacturing a secondary battery, includes: an electrode assembly formation process in which a unit stack is wound or stacked to form an electrode assembly; a coating process in which an area of a non-coating portion including a negative electrode tab and a positive electrode tab of the electrode assembly is coated; and a cleaning process in which the negative electrode tab and the positive electrode tab are cleaned after the coating process.
    Type: Application
    Filed: September 18, 2023
    Publication date: April 25, 2024
    Inventor: Gee Woo CHANG
  • Photocatalyst using semiconductor-carbon nanomaterial core-shell composite quantum dot and method for preparing the same
    Patent number: 9821303
    Abstract: The present invention relates to a photocatalyst using a semiconductor-carbon nanomaterial core-shell composite quantum dot and a method for preparing the same, more particularly to a microparticle in which a semiconductor-carbon nanomaterial core-shell composite quantum dot is self-assembled using 4-aminophenol, capable of improving photoelectrochemical response and photoconversion efficiency when used as a photocatalyst or a photoelectrode of a photoelectrochemical device, a photoelectrochemical device using the same and a method for preparing the same.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: November 21, 2017
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Ick Son, Jong Hyeok Park, Su Kang Bae, Jung Kyu Kim, Gee Woo Chang
  • PHOTOCATALYST USING SEMICONDUCTOR-CARBON NANOMATERIAL CORE-SHELL COMPOSITE QUANTUM DOT AND METHOD FOR PREPARING THE SAME
    Publication number: 20160144348
    Abstract: The present invention relates to a photocatalyst using a semiconductor-carbon nanomaterial core-shell composite quantum dot and a method for preparing the same, more particularly to a microparticle in which a semiconductor-carbon nanomaterial core-shell composite quantum dot is self-assembled using 4-aminophenol, capable of improving photoelectochemical response and photoconversion efficiency when used as a photocatalyst or a photoelectrode of a photoelectochemical device, a photoelectochemical device using the same and a method for preparing the same.
    Type: Application
    Filed: March 6, 2015
    Publication date: May 26, 2016
    Inventors: Dong Ick SON, Jong Hyeok PARK, Su Kang BAE, Jung Kyu KIM, Gee Woo CHANG