Patents by Inventor Leslie J. Van Nice, deceased

Leslie J. Van Nice, deceased 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: 5059307
    Abstract: In a process for reducing the sulfur and ash contents of coal, coal is sequentially contacted with fused alkali metal caustic, water, carbonic acid, and a strong acid. Caustic removed from the coal by the water and the carbonic acid is recovered as anhydrous caustic for again contacting coal.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: October 22, 1991
    Assignees: TRW Inc.
    Inventors: Robert A. Meyers, Walter D. Hart, Leslie J. Van Nice, deceased, Leslie J. Van Nice, heir