Patents by Inventor Hee Seok Na

Hee Seok Na 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).

  • Patent number: 8618191
    Abstract: Disclosed are an acrylic-based resin composition including (A) a first acrylic-based copolymer having a core-shell structure including a rubber having an average particle diameter of about 0.1 to about 0.30 ?m, (B) a second acrylic-based copolymer having a core-shell structure including a rubber having an average particle diameter of about 0.35 to about 0.6 ?m, (C) a vinyl-based copolymer, (D) an ultraviolet (UV) stabilizer, and (E) an UV absorber; and a molded product made using the same.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: December 31, 2013
    Assignee: Cheil Industries Inc.
    Inventors: Hee-Seok Na, Doo-Han Ha, Young-Sin Kim, Ji-Eun Park
  • Publication number: 20120172499
    Abstract: Disclosed are an acrylic-based resin composition including (A) a first acrylic-based copolymer having a core-shell structure including a rubber having an average particle diameter of about 0.1 to about 0.30 ?m, (B) a second acrylic-based copolymer having a core-shell structure including a rubber having an average particle diameter of about 0.35 to about 0.6 ?m, (C) a vinyl-based copolymer, (D) an ultraviolet (UV) stabilizer, and (E) an UV absorber; and a molded product made using the same.
    Type: Application
    Filed: September 21, 2011
    Publication date: July 5, 2012
    Applicant: CHEIL INDUSTRIES INC.
    Inventors: Hee-Seok NA, Doo-Han HA, Young-Sin KIM, Ji-Eun PARK
  • Patent number: 8114933
    Abstract: The thermoplastic rubber grafted copolymer resin composition comprising (A) about 100 parts by weight of a rubber grafted copolymer prepared by (a1) about 10 to 100 parts by weight of a rubber-modified grafted copolymer and (a2) about 0 to 90 parts by weight of copolymer prepared by vinyl cyanide compound/aromatic vinyl compound or methyl methacrylate or N-phenyl maleimide/vinyl cyanide monomer or aromatic vinyl monomer/methyl methacrylate or N-phenyl maleimide; (B) about 1 to 30 parts by weight of a maleic anhydride copolymer; and (C) about 1 to 20 parts by weight of a clay treated with a compound containing reactive functional groups; wherein said compound containing functional groups has a radical-polymerizable group and an onium ion that can ion-exchange with said clay.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: February 14, 2012
    Assignee: Cheil Industries Inc.
    Inventors: Tae Uk Kim, Hee Seok Na, Duk Hee Kim