Patents by Inventor Roger Marquart

Roger Marquart 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).

  • Measuring the thickness of hot slag in steelmaking
    Patent number: 6130637
    Abstract: Radar is used to measure not only the level of slag on molten steel but also its thickness; the measurement is used to calculate the volume of slag, and, in turn the amount of additives for slag treatment.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: October 10, 2000
    Assignee: USX Corporation
    Inventors: Gregory A. Meszaros, Roger Marquart, David J. Walker, John G. Estocin, Frank L. Kemeny