Patents by Inventor David J. Chappell

David J. Chappell 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).

  • Decontamination method
    Patent number: 5348567
    Abstract: A method for decontamination of steel components contaminated with radioactive material comprises the steps:(a) providing a mass of material including:(i) a proportion of steel carrying radioactive material; and(ii) a mass of slag forming material;(b) melting the mass of material, to provide a volume of molten steel and a volume of slag, the radioactive material originally present on the steel migrating to the slag; and(c) separating the slag from the molten steel. The mass of slag forming material is selected to provide a predetermined concentration of radioactive material in the slag. The concentration may be selected to be sufficiently dilute to allow disposal of the slag without restriction.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: September 20, 1994
    Assignee: Clyde Shaw Limited
    Inventor: David J. Chappell