Patents by Inventor Alexander Thulin

Alexander Thulin 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).

  • Duplex stainless steel
    Patent number: 11555231
    Abstract: The invention relates a duplex ferritic austenitic stainless steel having high formability utilizing the TRIP effect and high corrosion resistance with the balanced pitting resistance equivalent. The duplex stainless steel contains less than 0.04 weight % carbon, less than 0.7 weight % silicon, less than 2.5 weight % manganese, 18.5-22.5 weight % chromium, 0.8-4.5 weight % nickel, 0.6-1.4 weight % molybdenum, less than 1 weight % copper, 0.10-0.24 weight % nitrogen, the rest being iron and inevitable impurities occurring in stainless steels.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: January 17, 2023
    Assignee: OUTOKUMPU OYJ
    Inventors: James Oliver, Jan Y. Jonsson, Alexander Thulin
  • Duplex stainless steel
    Patent number: 9637813
    Abstract: The present invention relates to duplex ferritic austenitic stainless steel for the use chemical industry for nitric acid environments wherein good uniform corrosion resistance and high strength are required. The microstructure of the stainless steel has 35-65 volume % of ferrite, preferably 45-55 volume % of ferrite, the balance being austenite. The chemical composition contains less than 0.03 weight % carbon, less than 1 weight % silicon, less than 3 weight % manganese, 26-29.5 weight % chromium, 5-8.5 weight % nickel, 1-3 weight % molybdenum, 0.25-0.35 weight % nitrogen, 1-3 weight % copper, the rest being iron and inevitable impurities occurring in stainless steels.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: May 2, 2017
    Assignee: Outokumpu Oyj
    Inventors: Alexander Thulin, Jan Y. Jonsson, Mats Liljas, Rachel Pettersson, Jan-Olof Andersson, Staffan Hertzman
  • Duplex Stainless Steel
    Publication number: 20150050180
    Abstract: The present invention relates to duplex ferritic austenitic stainless steel for the use chemical industry for nitric acid environments wherein good uniform corrosion resistance and high strength are required. The microstructure of the stainless steel has 35-65 volume % of ferrite, preferably 45-55 volume % of ferrite, the balance being austenite. The chemical composition contains less than 0.03 weight % carbon, less than 1 weight % silicon, less than 3 weight % manganese, 26-29.5 weight % chromium, 5-8.5 weight % nickel, 1-3 weight % molybdenum, 0.25-0.35 weight % nitrogen, 1-3 weight % copper, the rest being iron and inevitable impurities occurring in stainless steels.
    Type: Application
    Filed: November 1, 2012
    Publication date: February 19, 2015
    Inventors: Alexander Thulin, Jan Y. Jonsson, Mats Liljas, Rachel Pettersson, Jan-Olof Andersson, Staffan Hertzman
  • DUPLEX STAINLESS STEEL
    Publication number: 20140219856
    Abstract: The invention relates a duplex ferritic austenitic stainless steel having high formability utilizing the TRIP effect and high corrosion resistance with the balanced pitting resistance equivalent. The duplex stainless steel contains less than 0.04 weight % carbon, less than 0.7 weight % silicon, less than 2.5 weight % manganese, 18.5-22.5 weight % chromium, 0.8-4.5 weight % nickel, 0.6-1.4 weight % molybdenum, less than 1 weight % copper, 0.10-0.24 weight % nitrogen, the rest being iron and inevitable impurities occurring in stainless steels.
    Type: Application
    Filed: September 5, 2012
    Publication date: August 7, 2014
    Applicant: OUTOKUMPU OYJ
    Inventors: James Oliver, Jan Y. Jonsson, Alexander Thulin