Patents by Inventor Klaus Gehnen

Klaus Gehnen 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).

  • Patent number: 5863356
    Abstract: The invention comprises a method for producing electric sheets, in particular grain-oriented electric sheets, with an evenly well-adhering glass film and with improved magnetic properties, in which the hot rolled strip which is produced at first and is optionally annealed is cold-rolled up to an end thickness in one or several steps, thereafter an annealing separator is applied to the strip which is rolled up to the end thickness, and is dried, and therafter the cold strip thus coated is subjected to high-temperature annealing, with an important component of the annealing separator being a hydrous magnesium oxide (MgO) dispersion and the annealing separator being additionally provided with at least one additive. The characterizing feature of the invention is that a finely dispersed water-soluble sodium phosphate compound is used as at least one additive.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: January 26, 1999
    Assignee: EBG Gesellschaft fur Elektromagnetische Werkstoffe mbH
    Inventors: Fritz Bolling, Brigitte Hammer, Thomas Dolle, Klaus Gehnen, Heiner Schrapers