Patents by Inventor Anders Waleij

Anders Waleij 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).

  • Method at treatment of metals
    Patent number: 6174383
    Abstract: The invention relates to a method at pickling of steel in an acidic aqueous pickling solution containing Fe3+ and Fe2+, wherein the steel is contacted with pickling solution that continuously is brought to circulate through a conduit into which hydrogen peroxide is supplied to oxidize Fe2+ to Fe3+.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: January 16, 2001
    Assignee: EKA Chemicals AB
    Inventors: Charlotte Angel, Troy Berglind, Arne Frestad, Sven-Eric Lunner, Anders Waleij
  • Method at treatment of metals
    Patent number: 5810939
    Abstract: The invention relates to a method for pickling steel in an acidic aqueous pickling solution containing Fe.sup.3+ and Fe.sup.2+, wherein the steel is contacted with pickling solution that continuously is brought to circulate through a conduit into which hydrogen peroxide is supplied to oxidize Fe.sup.2+ to Fe.sup.3+.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: September 22, 1998
    Assignee: EKA Chemicals AB
    Inventors: Charlotte Angel, Troy Berglind, Arne Frestad, Sven-Eric Lunner, Anders Waleij