Patents by Inventor Robert John Gordon Roth

Robert John Gordon Roth 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).

  • Lubricant mixtures and grease compositions based thereon
    Patent number: 5854185
    Abstract: The present invention provides lubricant mixtures for use as base fluid in bearing grease comprising 25 to 90 percent w/w of a liquid ester having a viscosity at 40.degree. C. in the range 100 to 200 mm.sup.2 /s, and 75 to 10 percent w/w of a liquid poly-.alpha.-olefin having a viscosity at 100.degree. C. in the range 2 to 10 mm.sup.2 /s, and bearing grease compositions containing a major proportion of such lubricant mixtures, particularly such compositions containing a clay thickener.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: December 29, 1998
    Assignee: Shell Oil Company
    Inventors: Robert John Gordon Roth, Georgina Ann Winterburn