Patents by Inventor Roger L. Altman

Roger L. Altman 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).

  • Patent number: 4263042
    Abstract: Soda matte slags are rendered resistant to spontaneous combustion through the addition of silica-bearing fluxes which convert sulfides to silicates.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: April 21, 1981
    Assignee: N. L. Industries, Inc.
    Inventors: Roger L. Altman, M. Vikram Rao
  • Patent number: 4172715
    Abstract: The autoignition of slags produced by the soda smelting of metal containing substances such as lead and antimony bearing materials is prevented through the minimization of iron and entrained coke in the slag and through removal of entrained coke from the slag.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: October 30, 1979
    Assignee: N L Industries, Inc.
    Inventors: Roger L. Altman, Karl D. Libsch, M. Vikram Rao