Patents by Inventor Doo-Jin PAIK

Doo-Jin PAIK 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).

  • Steel sheet having excellent image clarity after painting
    Patent number: 11584973
    Abstract: Provided is a steel sheet having excellent image clarity after painting, including: carbon (C): 0.001% to 0.03%, silicon (Si): 0.001% to 0.35%, manganese (Mn): 0.05% to 2.2%, phosphorus (P): 0.003% to 0.1%, sulfur (S): 0.001% or 0.025%, aluminum (Al): 0.01% to 0.1%, nitrogen (N): 0.001% to 0.007%, and a remainder of iron (Fe) and inevitable impurities. The microstructure of the steel sheet mainly is ferrite phases. An R-cube texture of a surface layer of the steel sheet is 5% or less by area %.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: February 21, 2023
    Assignee: POSCO CO., LTD
    Inventors: Doo-Jin Paik, Seul-Ki Park, Chung-Won Kim, Jung-Ki Kim, Sung-Il Kim, Hyeon-Seok Hwang, Je-Woong Lee, Jeong-Eun Kim, Cho-Rong Hong
  • STEEL SHEET HAVING EXCELLENT IMAGE CLARITY AFTER PAINTING AND METHOD FOR MANUFACTURING SAME
    Publication number: 20200347474
    Abstract: Provided is a steel sheet having excellent image clarity after painting, including: carbon (C): 0.001% to 0.03%, silicon (Si): 0.001% to 0.35%,manganese (Mn): 0.05% to 2.2%, phosphorus (P): 0.003% to 0.1%, sulfur (S): 0.001% or 0.025%, aluminum (Al): 0.01%to 0.1%, nitrogen (N): 0.001% to 0.007%, and a remainder of iron (Fe) and inevitable impurities. The microstructure of the steel sheet mainly is ferrite phases. An R-cube texture of a surface layer of the steel sheet is 5% or less by area %.
    Type: Application
    Filed: September 13, 2018
    Publication date: November 5, 2020
    Inventors: Doo-Jin PAIK, Seul-Ki PARK, Chung-Won KIM, Jung-Ki KIM, Sung-Il KIM, Hyeon-Seok HWANG, Je-Woong LEE, Jeong-Eun KIM, Cho-Rong HONG