Patents by Inventor Won San CHOI

Won San 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).

  • GRAPHENE-IRON OXIDE COMPLEX AND FABRICATION METHOD THEREOF
    Publication number: 20120168383
    Abstract: A graphene-iron oxide complex consists of graphene and needle-like iron oxide nanoparticles grown on a surface of the graphene, and a fabricating method thereof includes (A) preparing a reduced graphene dispersed solution, (B) mixing the dispersed solution with a solution containing iron oxide precursors to prepare a mixture, (C) stirring the mixture to prepare a graphene-iron oxide dispersed solution containing the graphene-iron oxide complex that needle-like iron oxide nanoparticles are grown on the surface of the graphene, and (D) separating the graphene-iron oxide complex from the graphene-iron oxide complex dispersed solution.
    Type: Application
    Filed: September 13, 2011
    Publication date: July 5, 2012
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hye Young KOO, Won San CHOI, Jun Kyung KIM
  • REUSABLE HEAVY METAL REMOVER AND FABRICATION METHOD THEREOF
    Publication number: 20110294660
    Abstract: A heavy metal remover of a core-shell structure comprises a core including carbon nanotubes (CNT) that can aggregate and scatter in a reversible manner, and a shell including iron oxide.
    Type: Application
    Filed: October 1, 2010
    Publication date: December 1, 2011
    Inventors: Hye Young KOO, Jun Kyung KIM, Won San CHOI, Ha Jin LEE