Patents by Inventor Seok-Chan CHOE

Seok-Chan CHOE 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).

  • Composition for washing pickled steel plate, method for washing pickled steel plate by using same, and steel plate obtained thereby
    Patent number: 11332667
    Abstract: A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: May 17, 2022
    Assignee: POSCO
    Inventors: Rho-Bum Park, Yon-Kyun Song, Ji-Hoon Park, Hoon Yun, Seok-Chan Choe, Kyoung-Pil Ko
  • COMPOSITION FOR WASHING PICKLED STEEL PLATE, METHOD FOR WASHING PICKLED STEEL PLATE BY USING SAME, AND STEEL PLATE OBTAINED THEREBY
    Publication number: 20210261862
    Abstract: A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same.
    Type: Application
    Filed: May 11, 2021
    Publication date: August 26, 2021
    Inventors: Rho-Bum PARK, Yon-Kyun SONG, Ji-Hoon PARK, Hoon YUN, Seok-Chan CHOE, Kyoung-Pil KO
  • Composition for washing pickled steel plate, method for washing pickled steel plate by using same, and steel plate obtained thereby
    Patent number: 11028322
    Abstract: A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 8, 2021
    Assignee: POSCO
    Inventors: Rho-Bum Park, Yon-Kyun Song, Ji-Hoon Park, Hoon Yun, Seok-Chan Choe, Kyoung-Pil Ko
  • COMPOSITION FOR WASHING PICKLED STEEL PLATE, METHOD FOR WASHING PICKLED STEEL PLATE BY USING SAME, AND STEEL PLATE OBTAINED THEREBY
    Publication number: 20200270521
    Abstract: A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same.
    Type: Application
    Filed: December 19, 2016
    Publication date: August 27, 2020
    Inventors: Rho-Bum PARK, Yon-Kyun SONG, Ji-Hoon PARK, Hoon YUN, Seok-Chan CHOE, Kyoung-Pil KO