Patents by Inventor Charles Zebula

Charles Zebula 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).

  • Process for beneficiating oil shale using froth flotation and selective flocculation
    Patent number: 4673133
    Abstract: A process for beneficiating oil shale is disclosed including the steps of grinding the shale to fine particles in an aqueous medium, portions of which are kerogen-rich and kerogen-poor, scrubbing the particles, separating the particles by either selectively flocculating out a fraction, redispersing the fraction and reseparating using froth flotation, or vice versa, and oil agglomerating/dewatering the kerogen-rich fraction.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: June 16, 1987
    Assignee: Chevron Research Company
    Inventors: Rabinder S. Datta, Frank F. Aplan, Charles Zebula