Patents by Inventor Han Seog Cho

Han Seog Cho 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).

  • Zinc-plated steel sheet for hot pressing having outstanding surface characteristics, hot-pressed moulded parts obtained using the same, and a production method for the same
    Patent number: 11952652
    Abstract: Provided is a method of manufacturing a zinc-plated steel sheet. The method includes: coating a metal on the steel sheet on a steel sheet; annealing the metal coated steel sheet; and zinc plating the annealed steel sheet by dipping in a molten zinc plating bath. Further provided is a method of manufacturing a hot-press part including: coating a metal on the steel sheet on a steel sheet; annealing the metal coated steel sheet; zinc plating the annealed steel sheet by dipping in a molten zinc plating bath; heating the zinc-plated steel sheet; and press forming the heated steel sheet.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: April 9, 2024
    Assignee: POSCO CO., LTD
    Inventors: Il-Ryoung Sohn, Jong-Sang Kim, Joong-Chul Park, Yeol-Rae Cho, Jin-Keun Oh, Han-Gu Cho, Bong-Hoon Chung, Jong-Seog Lee
  • Composite composition comprising sodium percarbonate with improved solubility
    Patent number: 6218352
    Abstract: This invention relates to a composite composition comprising granular sodium percarbonate with better stability in storage and fast solubility in water for the purpose of the sole use thereof or as a composition of a bleaching agent.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: April 17, 2001
    Assignee: Oriental Chemical Industries
    Inventors: Sang Hwa Lee, Chong Yun Kwag, Jong Pill Lee, Han Seog Cho