Patents by Inventor Richard A. Barstow

Richard A. Barstow 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).

  • Shaft furnace
    Patent number: 5890889
    Abstract: An improved hearth section for a shaft furnace may comprise a plurality of splines mounted to the side wall of the hearth section in spaced-apart circumferential positions so that each of the splines extends radially inward from the side-wall and into the interior of the hearth section. The floor of the hearth section may include a plurality of stand-offs positioned in generally spaced-apart relation and that extend upward from the floor and into the interior of the hearth section.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: April 6, 1999
    Assignee: Cyprus Amax Minerals Company
    Inventor: Richard A. Barstow