Patents by Inventor Heekyoung RYOO

Heekyoung RYOO 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).

  • Publication number: 20230056069
    Abstract: Provided are a thermoplastic resin composition and a molded product produced therefrom, and the thermoplastic resin composition includes 100 parts by weight of a base resin including (A) 65 to 85 wt % of a polycarbonate resin, (B) 7 to 20 wt % of an acrylic rubber-modified aromatic vinyl-based graft copolymer, and (C) 7 to 20 wt % of an aromatic vinyl-vinyl cyanide copolymer; (D) 0.7 to 5 parts by weight of zinc oxide (ZnO); and (E) 7 to 15 parts by weight of a block copolymer including a polyether segment and a polyamide segment, wherein the (D) zinc oxide has an average particle diameter of 0.5 to 3 ?m, a peak position 2 ? value obtained by X-ray diffraction (XRD) analysis of 35 to 37°, and a crystallite size according to Equation 1 of 1,000 to 2,000 ?. Equation 1 is the same as disclosed in the specification.
    Type: Application
    Filed: December 24, 2020
    Publication date: February 23, 2023
    Inventors: Jaekeun HONG, Keehae KWON, Doo Young KIM, Heekyoung RYOO
  • Publication number: 20220340750
    Abstract: Provided are a thermoplastic resin composition and a molded product manufactured therefrom, the thermoplastic resin composition including, based on 100 parts by weight of a base resin including (A) 75 to 85 wt % of a polycarbonate resin; (B) 7 to 15 wt % of an acrylic rubber-modified aromatic vinyl graft copolymer; and (C) 7 to 13 wt % of an aromatic vinyl-vinyl cyanide copolymer; (D) 0.7 to 5 parts by weight of zinc oxide (ZnO); and (E) 0.2 to 0.6 parts by weight of a phosphorus-based compound represented by Chemical Formula 1. (RO)nP(?O)(OH)3-n??[Chemical Formula 1] In Chemical Formula 1, n is an integer of 1 to 3, and R is selected from a substituted or unsubstituted C1 to C30 alkyl group, a C2 to C30 alkenyl group, a C2 to C30 alkynyl group, a substituted or unsubstituted C1 to C30 and a substituted or unsubstituted C3 to C30 heteroaryl group.
    Type: Application
    Filed: September 29, 2020
    Publication date: October 27, 2022
    Inventors: Doo Young KIM, Heekyoung RYOO, Keehae KWON, Jaekeun HONG