Patents by Inventor Robert H. Kaiser

Robert H. Kaiser 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).

  • Desulfurization agent
    Patent number: 5149364
    Abstract: The desulfurization agent for molten iron is made up of 70 to 95% commercial calcium carbide, 5 to 25% silicon dioxide, 0 to 10% of a metal oxide, and 0 to 5% calcium fluoride. The metal oxides are iron oxides and manganese oxides. The desulfurizing agent has been found to reduce the amount of calcium carbide in the resulting slag.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: September 22, 1992
    Assignee: Elkem Metals Company
    Inventors: Donald B. Craig, Thomas K. McCluhan, Robert H. Kaiser
  • Desulfurization agent
    Patent number: 5078784
    Abstract: The desulfurization agent for molten iron is made up of 70 to 95% commercial calcium carbide, 5 to 25% silicon dioxide, 0 to 10% of a metal oxide; and 0 to 5% calcium fluoride. The metal oxides are iron oxides and manganese oxides. The desulfurizing agent has been found to reduce the amount of calcium carbide in the resulting slag.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: January 7, 1992
    Assignee: Elkem Metals Company
    Inventors: Donald B. Craig, Thomas K. McCluhan, Robert H. Kaiser
  • Dephosphorization process for manganese alloys
    Patent number: 4752327
    Abstract: A method for dephosphorizing a manganese alloy by first desiliconizing the alloy to a level below 0.6%, and then dephosphorizing the low silicon alloy with barium carbonate or barium oxide in combination with an oxidizing agent. The lower the silicon content the better the results.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: June 21, 1988
    Assignee: Elkem Metals Company
    Inventors: Young E. Lee, Robert H. Kaiser
  • Dephosphorization process for manganese-containing alloys
    Patent number: 4684403
    Abstract: A method for dephosphorizing a manganese containing melt is disclosed. The method encompasses the addition of a magnesium compound to a manganese containing melt to form magnesium phosphides which are removed from the melt. The method is carried out under pressure and the addition of a flux in the melt is employed to facilitate the removal of the phosphides from the melt.
    Type: Grant
    Filed: June 19, 1986
    Date of Patent: August 4, 1987
    Assignee: Elkem Metals Company
    Inventors: Young E. Lee, James H. Downing, Robert H. Kaiser
  • Method for producing metal sulfide and the product produced therefrom
    Patent number: 4676970
    Abstract: A method for making a fused compound from a metal and a non-metal and more particularly a method for making a metal sulfide is disclosed. The method is particularly advantageous in making manganese sulfide. An excess of metal and recycled compound are used to control sulfur vaporization and a portion of the product is recycled to control the reaction. Conventional equipment can be used in the method.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: June 30, 1987
    Assignee: Elkem Metals Company
    Inventors: Lamar S. Todd, Robert H. Kaiser, Donald R. Hilburger
  • Method for admixing solids in molten metal
    Patent number: 4063932
    Abstract: A vessel in which molten metal is stirred is provided with an interior configuration which prevents the formation of a vortex in the stirred metal thereby reducing the surface area of the metal.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: December 20, 1977
    Assignee: Union Carbide Corporation
    Inventors: James H. Downing, Robert H. Kaiser, William L. Murphy, William R. Vaughn