Patents by Inventor Hak-Kyung Kim

Hak-Kyung 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).

  • Hetero-branched radial polystyrene-polyisoprene block copolymer composition and preparation method thereof
    Patent number: 6987145
    Abstract: Disclosed is a hetero-branched radial block copolymer suitable as a base polymer of pressure-sensitive adhesives, the hetero-branched radial block having a hetero-branched structure comprised of polystyrene, polyisoprene, and polybutadiene blocks and being represented by (pS-pI)3X-(pB-pI-pS) wherein pS is polystyrene; pI is polyisoprene; pB is polybutadiene; and X is a residue of a tetravalent coupling agent.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: January 17, 2006
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Sam-Min Kim, Dai-Seung Choi, Jong-Geun Kim, Hak-Kyung Kim, Tae-Yi Kang
  • Hetero-branched radial polystyrene-polyisoprene block copolymer composition and preparation method thereof
    Publication number: 20050131159
    Abstract: Disclosed is a hetero-branched radial block copolymer suitable as a base polymer of pressure-sensitive adhesives, the hetero-branched radial block having a hetero-branched structure comprised of polystyrene, polyisoprene, and polybutadiene blocks and being represented by (pS-pI)3X-(pB-pI-pS) wherein pS is polystyrene; pI is polyisoprene; pB is polybutadiene; and X is a residue of a tetravalent coupling agent.
    Type: Application
    Filed: December 15, 2003
    Publication date: June 16, 2005
    Applicant: KOREA KUMHO PETROCHEMICAL CO. LTD.
    Inventors: Sam-Min Kim, Dai-Seung Choi, Jong-Geun Kim, Hak-Kyung Kim, Tae-Yi Kang