Patents by Inventor Sang Rok Do

Sang Rok Do 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).

  • Polyethylene with controlled wax content, chlorinated polyethylene thereof and molded article produced from the chlorinated polyethylene
    Patent number: 9796797
    Abstract: Disclosed are polyethylene, chlorinated polyethylene thereof and a molded article produced from the chlorinated polyethylene. More specifically, disclosed are polyethylene for preparation of chlorinated polyethylene, the polyethylene having a molecular weight distribution (MWD) of 5 or less, a melting index (5.0 kg) of 0.1 to 10 dg/min, a weight average molecular weight of 50,000 to 300,000 g/mol, a melting temperature of 125 to 135° C., a wax content of 0.0001 to 3% by weight or 0.01 to 0.3% by weight and a density of 0.94 g/cm3 or more, chlorinated polyethylene thereof and a molded article produced from the chlorinated polyethylene.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: October 24, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Soung Hun Yoo, Geun Yeol Bae, Sang Rok Do
  • Cross-linked polyethylene compositions
    Patent number: 9589700
    Abstract: A cross-linked polyethylene composition for a power cable insulator including (A) 100 parts by weight of a polyethylene base resin, (B) 0.1 to 0.6 parts by weight of a hindered phenol-based antioxidant, (C) 1 to 4 parts by weight of a crosslinking agent, (D) 0.2 to 1.0 parts by weight of magnesium oxide and (E) 0.1 to 1.0 parts by weight of a scorch inhibitor, which advantageously exhibits superior resistance to water tree generated when a power cable insulator is exposed to outside water and electric field, and superior electrical insulation characteristics.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 7, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Ka Ram Sun, In Gyu Park, Youn Sun Nam, Young Il Song, Sang Rok Do
  • POLYETHYLENE WITH CONTROLLED WAX CONTENT, CHLORINATED POLYETHYLENE THEREOF AND MOLDED ARTICLE PRODUCED FROM THE CHLORINATED POLYETHYLENE
    Publication number: 20160229931
    Abstract: Disclosed are polyethylene, chlorinated polyethylene thereof and a molded article produced from the chlorinated polyethylene. More specifically, disclosed are polyethylene for preparation of chlorinated polyethylene, the polyethylene having a molecular weight distribution (MWD) of 5 or less, a melting index (5.0 kg) of 0.1 to 10 dg/min, a weight average molecular weight of 50,000 to 300,000 g/mol, a melting temperature of 125 to 135° C., a wax content of 0.0001 to 3% by weight or 0.01 to 0.3% by weight and a density of 0.94 g/cm3 or more, chlorinated polyethylene thereof and a molded article produced from the chlorinated polyethylene.
    Type: Application
    Filed: April 17, 2014
    Publication date: August 11, 2016
    Inventors: Soung Hun YOO, Geun Yeol BAE, Sang Rok DO
  • CROSS-LINKED POLYETHYLENE COMPOSITIONS (As Amended)
    Publication number: 20140113133
    Abstract: Disclosed is a cross-linked polyethylene composition comprising (A) 100 parts by weight of a polyethylene base resin, (B) 0.1 to 0.6 parts by weight of a hindered phenol-based antioxidant, (C) 1 to 4 parts by weight of a crosslinking agent, (D) 0.2 to 1.9 parts by weight of magnesium oxide and (E) 0.1 to 1.0 parts by weight of a scorch inhibitor, thus advantageously exhibiting superior resistance to water tree generated when a power cable insulator is exposed to outside water and electric field, and superior electrical insulation characteristics.
    Type: Application
    Filed: July 31, 2012
    Publication date: April 24, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Ka Ram Sun, In Gyu Park, Youn Sun Nam, Young II Song, Sang Rok Do