Patents by Inventor Dean H. Guffey

Dean H. Guffey 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).

  • Thermal desulfurization and calcination of petroleum coke
    Patent number: 4160814
    Abstract: Low sulfur calcined coke is produced from high sulfur raw coke without substantially lowering its bulk density by heating the coke at a first temperature such that no more than about 70 wt.% of the volatile matter is removed therefrom and then heating the partially devolatilized coke at a higher temperature sufficient to effect calcination and desulfurization.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: July 10, 1979
    Assignee: Great Lakes Carbon Corporation
    Inventors: Edward E. Hardin, Dean H. Guffey, Lloyd I. Grindstaff