Patents by Inventor Cheol Woo Yoon

Cheol Woo Yoon 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).

  • Electrode Slurry Coating Apparatus and Method for Forming Double Active Material Layers
    Publication number: 20240079547
    Abstract: The present invention relates to electrode slurry coating apparatus and method, the present invention ultimately allowing the process efficiency to be increased and rate of errors to be reduced when double-layer structured active material layers are formed by temporally adjusting the height of first and second discharge outlets through which active material is discharged.
    Type: Application
    Filed: November 7, 2023
    Publication date: March 7, 2024
    Applicant: LG Energy Solution, Ltd.
    Inventors: Taek Soo Lee, Young Joon Jo, Sang Hoon Choy, Ki Tae Kim, Ji Hee Yoon, Cheol Woo Kim
  • Method of separating rare earth elements from rare earth polishing powder wastes
    Patent number: 10738369
    Abstract: The present invention relates to a method of separating rare earth elements from rare earth polishing powder waste by a hydrometallurgical process, the method comprising the steps of: synthesizing sodium rare-earth double sulfates by adding sulfuric acid and sodium hydroxide to the rare earth polishing powder waste; converting the sodium rare-earth double sulfates into rare earth hydroxides; and separating cerium (Ce), lanthanum (La), praseodymium (Pr), and neodymium (Nd) from the rare earth hydroxides by adding hydrochloric acid and sulfuric acid. The present invention makes it possible to recover 99% or more of rare earth elements, including cerium (Ce), lanthanum (La), praseodymium (Pr), and neodymium (Nd) from rare earth polishing powder waste, and enables the recovered rare earth elements to be recycled, thereby achieving great industrial economic benefits.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: August 11, 2020
    Assignee: NATIONAL INSTITUTE OF ENVIRONMENTAL RESEARCH
    Inventors: Namil Um, Mi-Jeong Jeong, Young Yeul Kang, Ki-Heon Kim, Cheol Woo Yoon, Yong Jun Kim, Yoon-A Cho, Byung-Seo Lim, Sun Kyoung Shin, YoungKee Lee
  • METHOD OF SEPARATING RARE EARTH ELEMENTS FROM RARE EARTH POLISHING POWER WASTES
    Publication number: 20180195146
    Abstract: The present invention relates to a method of separating rare earth elements from rare earth polishing powder waste by a hydrometallurgical process, the method comprising the steps of: synthesizing sodium rare-earth double sulfates by adding sulfuric acid and sodium hydroxide to the rare earth polishing powder waste; converting the sodium rare-earth double sulfates into rare earth hydroxides; and separating cerium (Ce), lanthanum (La), praseodymium (Pr), and neodymium (Nd) from the rare earth hydroxides by adding hydrochloric acid and sulfuric acid. The present invention makes it possible to recover 99% or more of rare earth elements, including cerium (Ce), lanthanum (La), praseodymium (Pr), and neodymium (Nd) from rare earth polishing powder waste, and enables the recovered rare earth elements to be recycled, thereby achieving great industrial economic benefits.
    Type: Application
    Filed: November 29, 2017
    Publication date: July 12, 2018
    Inventors: Namil Um, Mi-Jeong Jeong, Young Yeul Kang, Ki-Heon Kim, Cheol Woo Yoon, Yong Jun Kim, Yoon-A Cho, Byung-Seo Lim, Sun Kyoung Shin, YoungKee Lee