Patents by Inventor Oh-Joon Kwan

Oh-Joon Kwan 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).

  • Method of manufacturing iron-based powder
    Patent number: 9156090
    Abstract: A method of manufacturing iron-based powder includes providing an iron-based molten steel manufactured through a iron making process and a steelmaking process to a tundish; and performing water atomization over the molten steel discharged through a nozzle connected to the tundish. The iron-based powder is manufactured from the molten steel refined after a molten iron tapped from a iron making process is charged into a converter without a pre-treatment process of the molten iron, thus economically providing the highly clean iron-based powder.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: October 13, 2015
    Assignees: POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
    Inventors: Ha Neul Kim, Eon Sik Lee, Oh-Joon Kwan, Sun Jong Park, Hee Soo Kang