Patents by Inventor Johan NORSTROM

Johan NORSTROM 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 wire, a method for manufacturing the same, and method for manufacturing a spring or medical wire products
    Patent number: 11767585
    Abstract: The invention relates to a steel wire suitable for making a spring or medical wire products which remarkably improve the performance of conventional stainless steel wire. The steel comprises (in wt. %): C: 0.02 to 0.15, Si: 0.1 to 0.9, Mn: 0.8 to 1.6, Cr 16 to 20, Ni: 7.5 to 10.5, Mo: ?3, Al: 0.5 to 2.5, Ti: ?0.15, N: ?0.05, optional elements, and impurities, balance Fe, wherein the total amount of Cr and Ni is 25 to 27 wt. %, and wherein the steel has a microstructure including, in volume % (vol. %), martensite: 40 to 90, austenite: 10 to 60, and delta ferrite: ?5.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: September 26, 2023
    Assignees: SUZUKI-SUMIDEN STAINLESS STEEL WIRE CO., LTD, SUZUKI GARPHYTTAN AB
    Inventors: Johan Norstrom, David Thureborn, Fumito Kanno, Masaki Ishihara
  • A STEEL WIRE, A METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR MANUFACTURING A SPRING OR MEDICAL WIRE PRODUCTS
    Publication number: 20210156014
    Abstract: The invention relates to a steel wire suitable for making a spring or medical wire products which remarkably improve the performance of conventional stainless steel wire. The steel comprises (in wt. %): C: 0.02 to 0.15, Si: 0.1 to 0.9, Mn: 0.8 to 1.6, Cr 16 to 20, Ni: 7.5 to 10.5, Mo: ?3, Al: 0.5 to 2.5, Ti: ?0.15, N: ?0.05, optional elements, and impurities, balance Fe, wherein the total amount of Cr and Ni is 25 to 27 wt. %, and wherein the steel has a microstructure including, in volume % (vol. %), martensite: 40 to 90, austenite: 10 to 60, and delta ferrite: ?5.
    Type: Application
    Filed: April 24, 2019
    Publication date: May 27, 2021
    Inventors: Johan NORSTROM, David THUREBORN, Fumito KANNO, Masaki ISHIHARA