Patents by Inventor David R. Shidemantle

David R. Shidemantle 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).

  • Method for producing steel in a top oxygen blown vessel
    Patent number: 4529442
    Abstract: A method for producing steel in a top-blown molten metal vessel having a hot metal charge to form a bath. The method comprises top blowing from a lance oxygen gas onto or beneath the surface of the bath while introducing an inert gas to the bath from beneath the surface thereof during said top blowing. The rate of inert gas is increased progressively during top blowing of oxygen and the rate of oxygen is decreased progressively during said top blowing.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: July 16, 1985
    Assignee: Allegheny Ludlum Steel Corporation
    Inventors: Joseph W. Tommaney, David R. Shidemantle, Harry L. Bishop, Jr.