Patents by Inventor Hongkwan PARK

Hongkwan PARK 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 DECOLORIZING POLYESTER AND METHOD FOR DEPOLYMERISING POLYESTER COMPRISING THE SAME
    Publication number: 20240052130
    Abstract: Provided is a method for decolorizing a polyester, the method including exposing adding a decoloring agent to the polyester and then contacting the polyester with superheated water vapor.
    Type: Application
    Filed: November 3, 2021
    Publication date: February 15, 2024
    Inventors: Joonyoung YOON, Hongkwan PARK, Haelim CHO
  • Self-rechargeable hybrid battery and electronic device comprising the same
    Patent number: 10020118
    Abstract: The present invention relates to a self-rechargeable hybrid battery and an electronic device including the same. Since the self-rechargeable hybrid battery includes a solar cell and a capacitor which is charged by current output from the solar cell, the charging efficiency of energy output from a solar cell may be increased in an eco-friendly manner, and the self-rechargeable hybrid battery includes electrodes having high transparency, electrical conductivity and interfacial capacitance, and thus may be applied to a transparent device.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: July 10, 2018
    Assignee: UNIVERSITY-INDUSTRY FOUNDATION, YONSEI UNIVERSITY
    Inventors: Jung-Hyun Kim, Seung Hwan Lee, Jung Joon Lee, Dohyuk Yoo, So Yeon Kim, Se Yul Kim, Hongkwan Park
  • SELF-RECHARGEABLE HYBRID BATTERY AND ELECTRONIC DEVICE COMPRISING THE SAME
    Publication number: 20150340160
    Abstract: The present invention relates to a self-rechargeable hybrid battery and an electronic device including the same. Since the self-rechargeable hybrid battery includes a solar cell and a capacitor which is charged by current output from the solar cell, the charging efficiency of energy output from a solar cell may be increased in an eco-friendly manner, and the self-rechargeable hybrid battery includes electrodes having high transparency, electrical conductivity and interfacial capacitance, and thus may be applied to a transparent device.
    Type: Application
    Filed: May 20, 2015
    Publication date: November 26, 2015
    Inventors: Jung-Hyun KIM, Seung Hwan LEE, Jung Joon LEE, Dohyuk YOO, So Yeon KIM, Se Yul KIM, Hongkwan PARK