Patents by Inventor Sang Kon Ahn

Sang Kon Ahn 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).

  • Low-alloy duplex stainless steel having outstanding corrosion resistance and hot working properties
    Patent number: 10280491
    Abstract: Provided is a lean duplex stainless steel used in industrial facilities including fresh water, pulp and paper making, chemical and construction facilities. The lean duplex stainless steel comprises, in weight percentage (%), C: over 0 to 0.06 or less, Si: over 0 to 1.5% or less, Mn: over 0 to 2% or less, Cr: 19 to 23%, Ni: 1.8 to 3.5%, Mo: 0.5 to 1.0%, Cu: 0.3 to 1.0%, N: 0.16 to 0.30%, Al: 0.003 to 0.05%, B: 0.001 to 0.005% and Ca: 0.001 to 0.01%. In the stainless steel, the content of O of the stainless steel is 0.01% or less. The stainless steel comprises Fe and other unavoidable impurities as remnants.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: May 7, 2019
    Assignee: POSCO
    Inventors: Ji Soo Kim, Sang Kon Ahn, Bong Wn Kim, Kwang Tae Kim
  • Low-Alloy Duplex Stainless Steel Having Outstanding Corrosion Resistance and Hot Working Properties
    Publication number: 20150267285
    Abstract: Provided is a lean duplex stainless steel used in industrial facilities including fresh water, pulp and paper making, chemical and construction facilities. The lean duplex stainless steel comprises, in weight percentage (%), C: over 0 to 0.06 or less, Si: over 0 to 1.5% or less, Mn: over 0 to 2% or less, Cr: 19 to 23%, Ni: 1.8 to 3.5%, Mo: 0.5 to 1.0%, Cu: 0.3 to 1.0%, N: 0.16 to 0.30%, Al: 0.003 to 0.05%, B: 0.001 to 0.005% and Ca: 0.001 to 0.01%. In the stainless steel, the content of O of the stainless steel is 0.01% or less. The stainless steel comprises Fe and other unavoidable impurities as remnants.
    Type: Application
    Filed: September 28, 2012
    Publication date: September 24, 2015
    Inventors: Ji Soo Kim, Sang Kon Ahn, Bong Wn Kim, Kwang Tae Kim