Patents by Inventor Loren C. McClanathan

Loren C. McClanathan 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 upgrading coal
    Patent number: 5085764
    Abstract: In a process for reducing the sulfur and ash contents of coal, coal is sequentially contacted with fused alkali metal caustic, wash water, and acid. Contacting the coal with the caustic produces water-soluble compounds. Sufficient wash water is used to reduce the temperature of the caustic treated coal and dissolve the bulk of the water-soluble compounds before the water-soluble compounds convert to water-insoluble compounds that precipitate on the caustic-treated coal. Caustic removed from the coal by the water is recovered as anhydrous caustic for again contacting coal.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: February 4, 1992
    Assignee: TRW Inc.
    Inventors: Robert A. Meyers, Walter D. Hart, Loren C. McClanathan