Patents by Inventor Ludlow S. Daniels

Ludlow S. Daniels 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).

  • Method of an apparatus for recovering oil from solid hydrocarbonaceous material
    Patent number: 5073251
    Abstract: A method for the recovery of oil from solid hydrocarbonaceous material and particularly from oil shale by retorting fresh feed shale and heat medium particles using a fluidized bed. The invention uses a self supporting dense phase fluidized bed in a retort without the need to use an external fluid for fluidization.Also described is a control system for the method whereby feed stock input rate is controlled as a function of flow rate of oil vapour products given off, and whereby heat medium particle input rate is controlled as a function of the temperature of either the retort bed or of the oil vapor product.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: December 17, 1991
    Inventor: Ludlow S. Daniels