Patents by Inventor Charlotte Ulfvin

Charlotte Ulfvin 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).

  • Austenitic alloy
    Patent number: 6905652
    Abstract: An austenitic alloy with the following composition, in weight-%: Cr 23-30 Ni 25-35 Mo 3-6 Mn 1-6 N ??0-0.40 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 and the balance iron and normally occurring impurities and additions.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: June 14, 2005
    Assignee: Sandvik AB
    Inventors: Charlotte Ulfvin, Bertil Waldén
  • Use of an austenitic stainless steel
    Publication number: 20050028893
    Abstract: Austenitic alloy with following composition, in weight-percent: Cr 23-30, Ni 25-35, Mo 2.0-6.0, Mn 1.0-6.0, N 0-0.4, C up to 0.05, Si up to 1.0, S up to 0.02, Cu up to 3.0, W 0-6.0, one or more element of Mg, Ce, Ca, B, La, Pr, Zr, Ti, Nd up to 2.0 and balance Fe and normally occurring impurities and additions as wire in oil- and gasextraction, specially reinforcement wire in the application wirelines and which shows a combination of good corrosion resistance and good mechanical properties, especially a tensile strength of at least 310 kpsi at diameters of 1.0 mm and thinner.
    Type: Application
    Filed: September 25, 2002
    Publication date: February 10, 2005
    Inventors: Hakan Silfverlin, Charlotte Ulfvin, Gustaf Zetterholm
  • Austenitic alloy
    Publication number: 20020021980
    Abstract: An austenitic alloy with the following composition, in weight-%: 1 Cr 23-30 Ni 25-35 Mo 3-6 Mn 1-6 N   0-0.40 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.
    Type: Application
    Filed: May 22, 2001
    Publication date: February 21, 2002
    Inventors: Charlotte Ulfvin, Bertil Walden