Patents by Inventor David E. Mears

David E. Mears 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).

  • Hydroprocessing for producing lubricating oil base stocks
    Patent number: 5358627
    Abstract: High quality lubricating oil base stocks are produced from crude oils that contain significant concentrations of aromatic compounds in their higher boiling fractions. First, the crude is fractionated. After the residua fraction has been deasphalted, it is combined with the gas oil fraction. The resultant combined fraction is hydrocracked. The hydrocrackate is separated into a light fraction and a heavy fraction. The heavy fraction is hydrodewaxed, then hydrofinished. The hydrofinished product is combined with the light fraction and distilled into products including middle distillate fuel products and lubricating oil base stocks. The lubricating oil base stocks have high VI.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: October 25, 1994
    Assignee: Union Oil Company of California
    Inventors: David E. Mears, Michael G. Hunter