Patents by Inventor Curtis J. Hogan

Curtis J. Hogan 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).

  • Pyrolysis methods with product oil recycling
    Patent number: 4983278
    Abstract: A two step retorting process for pyrolyzing a solid feed selected from the group consisting of oil shale, tar sand, waste motor oil, and scrap tires to recover valuable products therefrom comprising retorting a mixture of the solid feed in heavy oil at a relatively low temperature, recycling the oil formed back to the first step, and completing the pyrolysis of the residue formed at a higher temperature in the absence of product oil recycling. Apparatus is provided including a means for feeding and soaking the solid feed, a HSPR, an IFBC, and means for handling product liquid and gas.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: January 8, 1991
    Assignee: Western Research Institute & ILR Services Inc.
    Inventors: Chang Y. Cha, Michael Duc, Curtis J. Hogan