Patents by Inventor Hyoung-whee Kim

Hyoung-whee Kim 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 PREPARING POLYMETHYLMETHACRYLATE SPHERICAL BEAD
    Publication number: 20090035334
    Abstract: This invention provides a method for preparing a polymethylmethacrylate spherical bead and in particular, it provides a method for preparing a polymethylmethacrylate spherical bead characterized in that it is prepared by preparing polymethylmethacrylate by polymerizing methyl-methacrylate monomers, evaporating remaining methylmethacrylate monomers by raising temperature up to at least 100° C. after the polymerization reaction, and washing the polymethylmethacrylate with a mixed solvent of ethanol and water and vacuum drying them.
    Type: Application
    Filed: August 26, 2005
    Publication date: February 5, 2009
    Applicant: SUNJIN CHEMICAL CO., LTD.
    Inventors: Sun-jae Kim, Hyoung-whee Kim, Suk-woo Shin, Han-song Chu