Patents by Inventor Troy Berglind

Troy Berglind 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 of treating a metal
    Patent number: 5958147
    Abstract: The invention relates to a method of pickling or surface treating a metal in an aqueous solution containing nitric acid wherein hydrogen peroxide is supplied to decrease the formation of nitrous fumes. At least a portion of the hydrogen peroxide is supplied by spraying or flushing an aqueous solution thereof directly on the metal through one or several separate nozzles (18a, 18b, 19a, 19b).
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: September 28, 1999
    Assignee: Akzo Nobel N.V.
    Inventors: Troy Berglind, Arne Frestad
  • 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
  • Redox-potential control for hydrogen peroxide in nitric acid
    Patent number: 5154906
    Abstract: A method of maintaining a given content of a substance A in an aqueous solution where it is continuously consumed and where the redox potential E, at least within the range of concentration used, approximately satisfies the equation:E=G+F(x)wherein x is the content of A, F is a function of x whose derivative dF/dx approaches zero when x assumes a high value, and G on the whole is independent of x but is influenced by other parameters, such as pH, temperature or the like. The addition of A is controlled in such manner that a set value of the redox potential is maintained. The set value is determined by increasing or decreasing the addition of A in a predetermined manner, whereupon the redox potential is measured, and the measured value is used for determining the set value.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: October 13, 1992
    Assignee: Eka Nobel AB
    Inventors: Ivan Dalin, Troy Berglind