Patents by Inventor Duhan Kim

Duhan Kim 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 FORMING STEEL SHEET, EQUIPMENT FOR FORMING THE SAME, AND FORMED PRODUCT
    Publication number: 20170204489
    Abstract: A formed product of a steel sheet is provided. The formed product includes a surface portion adjacent to an exterior surface and a central portion surrounded by the surface portion. A first phase has a maximum volume fraction in the surface portion, and a second phase has a minimum volume fraction in the surface portion. The second phase has a maximum volume fraction in the central portion, and the first phase has a minimum volume fraction in the central portion.
    Type: Application
    Filed: July 3, 2015
    Publication date: July 20, 2017
    Applicant: Industry-University Cooperation Foundation Hanyang University Erica Campus
    Inventors: Jongryoul Kim, Duhan Kim
  • HOT-ROLLED STEEL SHEET, METHOD OF MANUFACTURING THE SAME, AND EQUIPMENT FOR MANUFACTURING THE SAME
    Publication number: 20150184266
    Abstract: A method of manufacturing a hot-rolled steel sheet is explained. The method includes hot-rolling a slab, performing a first phase transformation process cooling a surface of the hot-rolled slab to phase-transform a structure of a surface portion of the hot-rolled slab, performing a second phase transformation process to phase-transform a structure of a central portion of the hot-rolled slab after the first phase transformation process, and coiling the slab including the phase-transformed surface portion and the phase-transformed central portion.
    Type: Application
    Filed: February 19, 2014
    Publication date: July 2, 2015
    Applicant: Industry-University Cooperation Foundation Hanyang University Erica Campus
    Inventors: Duhan Kim, Jongryoul Kim