Patents by Inventor Lloyd S. Grindstaff

Lloyd S. Grindstaff 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).

  • Production of pitch and coke from raw petroleum coke
    Patent number: 4369171
    Abstract: Raw petroleum coke is treated with a solvent to extract the soluble matter. The extracted matter is useful as coker feedstock, fuel, pitch binder, pitch precursor, impregnant and carbon black feedstock. The coke residue may be used without further treatment as a fuel or may be calcined for use in Hall aluminum cell anodes.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: January 18, 1983
    Assignee: Great Lakes Carbon Corporation
    Inventors: Lloyd S. Grindstaff, Edward E. Hardin