Patents by Inventor Sik-Cheol Kwon

Sik-Cheol Kwon 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).

  • Heat-treating method for improving wear-resistance and corrosion-resistance of chromium-plated steel substrate
    Patent number: 6846367
    Abstract: Disclosed is a method for improving the wear- and corrosion-resistance of a chromium-plated steel substrate by heat-treating the chromium-plated steel substrate under optimum conditions to inhibit a drop in corrosion-resistance of a steel substrate due to fine cracks formed at a chromium layer, and to improve a hardness of the chromium layer. The heat-treating method comprises the steps of: plating the chromium layer onto the steel substrate; and heating the chromium-plated steel substrate in an oxidizing gas environment at above atmospheric pressure to form oxidized layers containing magnetite (Fe3O4) on the surface of the steel substrate, the surface of the steel substrate being partly exposed to the air through penetrating cracks formed in the chromium layer.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: January 25, 2005
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Kee-Seok Nam, Sik-Cheol Kwon, Do-Yon Chang, Kyu-Hwan Lee, Man Kim, Dong-Soo Kim, Gun-Hwan Lee
  • Heat-treating method for improving wear-resistance and corrosion-resistance of chromium-plated steel substrate
    Publication number: 20040099344
    Abstract: Disclosed is a method for improving the wear- and corrosion-resistance of a chromium-plated steel substrate by heat-treating the chromium-plated steel substrate under optimum conditions to inhibit a drop in corrosion-resistance of a steel substrate due to fine cracks formed at a chromium layer, and to improve a hardness of the chromium layer. The heat-treating method comprises the steps of: plating the chromium layer onto the steel substrate; and heating the chromium-plated steel substrate in an oxidizing gas environment at above atmospheric pressure to form oxidized layers containing magnetite (Fe3O4) on the surface of the steel substrate, the surface of the steel substrate being partly exposed to the air through penetrating cracks formed in the chromium layer.
    Type: Application
    Filed: February 11, 2003
    Publication date: May 27, 2004
    Applicant: Korea Institute of Machinery and Materials
    Inventors: Kee-Seok Nam, Sik-Cheol Kwon, Do-Yon Chang, Kyu-Hwan Lee, Man Kim, Dong-Soo Kim, Gun-Hwan Lee