Patents by Inventor Stephen D. LeViness

Stephen D. LeViness 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).

  • Coal liquefaction using atomically dispersed metals
    Patent number: 5454934
    Abstract: A method for converting solid carbonaceous materials to liquid products. The solid carbonaceous material is first treated with a aqueous composition of a metal carbonate or bicarbonate. This results in the metal being atomically dispersed in the carbonaceous material. The treated solid carbonaceous material is then subjected to liquefaction conditions. The preferred metal is iron.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: October 3, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Stephen D. Reynolds, Claude C. Culross, Stephen D. LeViness, John W. Larsen