Patents by Inventor Narashima S. Raghavan

Narashima S. Raghavan 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).

  • Production of metal carbide articles
    Patent number: 5401694
    Abstract: A method for manufacture of Group IVB metal carbide comprising a carbide of a metal selected from the group consisting of titanium, hafnium and zirconium ceramic composites is provided wherein a permeable mass of filler and carbon is contacted with a molten Group IVB metal. The molten metal is maintained in contact with the permeable mass for a sufficient period to infiltrate the permeable mass and to react the molten metal with the carbon source to form a Group IVB metal carbide composite. The permeable mass may comprise a Group IVB metal carbide, or other inert filler, or a combination of filler materials.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: March 28, 1995
    Assignee: Lanxide Technology Company, LP
    Inventors: Adam J. Gesing, Edward S. Luce, Narashima S. Raghavan, Danny R. White
  • Production of metal carbide articles
    Patent number: 5254509
    Abstract: A method for manufacture of Group IVB metal carbide comprising a carbide of a metal selected from the group consisting of titanium, hafnium and zirconium ceramic composites is provided wherein a permeable mass of filler and carbon is contacted with a molten Group IVB metal. The molten metal is maintained in contact with the permeable mass for a sufficient period to infiltrate the permeable mass and to react the molten metal with the carbon source to form a Group IVB metal carbide composite. The permeable mass may comprise a Group IVB metal carbide, or other inert filler, or a combination of filler materials.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: October 19, 1993
    Assignee: Lanxide Technology Company, LP
    Inventors: Adam J. Gesing, Edward S. Luce, Narashima S. Raghavan, Danny R. White
  • Production of metal carbide articles
    Patent number: 5082807
    Abstract: A method for manufacture of Group IVB metal carbide ceramic composites is provided wherein a permeable mass of filler and carbon is contacted with a molten Group IVB metal. The molten metal is maintained in contact with the permeable mass for a sufficient period to infiltrate the permeable mass and to react the molten metal with the carbon source to form a Group IVB metal carbide composite. The permeable mass may comprise a Group IVB metal carbide, or other inert filler, or a combination of filler materials.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: January 21, 1992
    Assignee: Lanxide Technology Company, LP
    Inventors: Adam J. Gesing, Edward S. Luce, Narashima S. Raghavan, Danny R. White
  • Production of metal carbide articles
    Patent number: 4891338
    Abstract: A method for manufacture of Group IVB metal carbide ceramic composites is provided wherein a permeable mass of filler and carbon is contacted with a molten Group IVB metal. The molten metal is maintained in contact with the permeable mass for a sufficient period to infiltrate the permeable mass and to react the molten metal with the carbon source to form a Group IVB metal carbide composite. The permeable mass may comprise a Group IVB metal carbide, or other inert filler, or a combination of filler materials.
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: January 2, 1990
    Assignee: Lanxide Technology Company, LP
    Inventors: Adam J. Gesing, Edward S. Luce, Narashima S. Raghavan, Danny R. White
  • Production of ceramic and ceramic-metal composite articles incorporating filler materials
    Patent number: 4824625
    Abstract: A method of producing a composite comprising a self-supporting polycrystalline material obtained by oxidation reaction of a molten parent metal with a vapor-phase oxidant comprising infiltrating a filler exhibiting inter-particle pore volume with a parent metal under conditions which control the respective rates of said metal infiltration and said oxidation reaction.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: April 25, 1989
    Assignee: Lanxide Technology Company, LP
    Inventors: T. Dennis Claar, Steven D. Poste, Adam J. Gesing, Marek Sobczyk, Narashima S. Raghavan, Dave K. Creber, Alan S. Nagelberg