Patents by Inventor Soon-Ryung CHOI

Soon-Ryung 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).

  • RECOVERY METHOD OF TIN AND NICKEL FROM SCRAPS OF STEEL BALL FOR BARREL PLATING
    Publication number: 20130264217
    Abstract: The present invention relates to a method of recovering tin and nickel compounds with high purity at a high yield from scrap steel balls for barrel plating through simple processes without using an excess amount of a solvent, the method using an eco-friendly dry pretreatment and subsequent processes including hydrogen reduction and electrolytic refining under certain conditions.
    Type: Application
    Filed: May 3, 2012
    Publication date: October 10, 2013
    Applicant: TOWN MINING CO., LTD
    Inventors: Dae-Weon KIM, Seong-Tae JANG, Soon-Ryung CHOI