Patents by Inventor Ja-Hyung CHOI

Ja-Hyung 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).

  • PRETREATMENT METHOD FOR UTILIZATION OF COAL ASH LANDFILLED IN ASH PONDS
    Publication number: 20240189831
    Abstract: Disclosed is a pretreatment method for utilization of coal pond ash (coal ash buried in ash ponds near coal-fired power plants), and more specifically a treatment method of coal pond ash capable of utilizing coal ash with high efficiency through simple separation processes including screening, float-sink, flotation, grinding, and magnetic separation.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 13, 2024
    Inventors: Namil UM, Young Yeul KANG, Cheol Woo YOON, Soo Yeon HONG, Na Hyeon CHO, Min-Jung KIM, Ja-Hyung CHOI, Tae Wan JEON, Young Sam YOON