Patents by Inventor George Kuhlmann

George Kuhlmann 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).

  • Compositions for removing lead from metal surfaces
    Patent number: 8618038
    Abstract: The invention provides an aqueous composition that includes a hydroxy-substituted mono-, di-, or tri-carboxylic acid; phosphoric acid; a surfactant; and water. The invention further provides a method for removing lead from the surface of metal, the method includes contacting a metal surface with an aqueous composition that includes a hydroxy-substituted mono-, di-, or tri-carboxylic acid; phosphoric acid; a surfactant; and water; to provide a metal surface with a reduced amount of leachable lead. The leachable lead on the surface of the metal can be reduced to below 1 ppb by using the composition described herein.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: December 31, 2013
    Assignee: Stone Chemical Company
    Inventors: David Hunt, George Kuhlmann
  • Compositions and methods for removing lead from metal surfaces
    Patent number: 7771542
    Abstract: The invention provides an aqueous composition that includes a hydroxy-substituted mono-, di-, or tri-carboxylic acid; phosphoric acid; a surfactant; and water. The invention further provides a method for removing lead from the surface of metal, the method includes contacting a metal surface with an aqueous composition that includes a hydroxy-substituted mono-, di-, or tri-carboxylic acid; phosphoric acid; a surfactant; and water; to provide a metal surface with a reduced amount of leachable lead. The leachable lead on the surface of the metal can be reduced to below 1 ppb by using the composition described herein.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: August 10, 2010
    Assignee: Stone Chemical Company
    Inventors: David Hunt, George Kuhlmann