Patents by Inventor Jacobus Marthinus Andreas Geldenhuis

Jacobus Marthinus Andreas Geldenhuis 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).

  • Low cost making of a low carbon, low sulfur, and low nitrogen steel using conventional steelmaking equipment
    Patent number: 8313553
    Abstract: A method of making a steel with low carbon less than 0.035% by weight including steps of preparing a heat of molten steel composition in a steelmaking furnace to a tapping temperature as desired for desulfurization at a VTD, tapping open into a ladle the molten steel composition with an oxygen level between about 600 and 1120 ppm, providing slag forming compound to the ladle to form a slag cover over the molten steel composition in the ladle, transporting the molten steel composition in the ladle to a VTD, decarburizing the molten steel composition at the VTD by drawing a vacuum of less than 650 millibars, after decarburizing, adding one or more deoxidizers to the molten steel composition and deoxidizing the molten steel composition, after deoxidizing, adding one or more flux compounds to desulfurize the molten steel composition, and casting the molten steel composition to form a steel with low carbon less than 0.035% by weight.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: November 20, 2012
    Assignee: Nucor Corporation
    Inventors: Jacobus Marthinus Andreas Geldenhuis, David John Sosinsky, Daniel Gene Murray, David Wayne McGaughey, Eugene B. Pretorius
  • LOW COST MAKING OF A LOW CARBON, LOW SULFUR, AND LOW NITROGEN STEEL USING CONVENTIONAL STEELMAKING EQUIPMENT
    Publication number: 20100024596
    Abstract: A method of making a steel with low carbon less than 0.035% by weight including steps of preparing a heat of molten steel composition in a steelmaking furnace to a tapping temperature as desired for desulfurization at a VTD, tapping open into a ladle the molten steel composition with an oxygen level between about 600 and 1120 ppm, providing slag forming compound to the ladle to form a slag cover over the molten steel composition in the ladle, transporting the molten steel composition in the ladle to a VTD, decarburizing the molten steel composition at the VTD by drawing a vacuum of less than 650 millibars, after decarburizing, adding one or more deoxidizers to the molten steel composition and deoxidizing the molten steel composition, after deoxidizing, adding one or more flux compounds to desulfurize the molten steel composition, and casting the molten steel composition to form a steel with low carbon less than 0.035% by weight.
    Type: Application
    Filed: March 30, 2009
    Publication date: February 4, 2010
    Applicant: NUCOR CORPORATION
    Inventors: Jacobus Marthinus Andreas Geldenhuis, David John Sosinsky, Daniel Gene Murray, David Wayne McGaughey, Eugene B. Pretorius