Patents by Inventor Thomas L. Speer

Thomas L. Speer 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).

  • Slurry backfilling of in situ oil shale retort
    Patent number: 4131416
    Abstract: Disclosed is a process for the slurry backfilling of subterranean in situ oil shale retorts, especially the improvement comprising introducing a slurry of sand and water into the subterranean retort so as to form drainage paths for the removal of water from the slurry of spent shale and water.
    Type: Grant
    Filed: August 30, 1977
    Date of Patent: December 26, 1978
    Assignee: Standard Oil Company (Indiana)
    Inventors: George H. Watson, Thomas L. Speer