Patents by Inventor Thomas D. Wilkinson

Thomas D. Wilkinson 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).

  • Lubricating oil composition
    Patent number: 11142719
    Abstract: A lubricating oil composition for reducing low-speed pre-ignition events or improving oxidation in a spark-ignited direct injection engine is disclosed. The composition includes a detergent additive which comprises either: an oil-soluble sulfonate including both magnesium and calcium as cations; or an oil-soluble salicylate including both magnesium and calcium as cations.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: October 12, 2021
    Inventors: Alastair A. Cant, Adam P. Marsh, Robert W. Shaw, Thomas D. Wilkinson
  • MAGNESIUM SULFONATE SYNTHESIS
    Publication number: 20180179243
    Abstract: An overbased magnesium sulfonate detergent is made by (A) preparing a mixture of a sulfonic acid or salt with a magnesium oxide, water, a C1-C5 alkanol, a hydrocarbon solvent, and a combination of a polyisobutene succinic anhydride of molecular weight (Mw) 500 to 1500 g mol?1 and a salicylic acid as first and second promoters; and (B) carbonating the mixture with an acidic gas to form the overbased magnesium sulfonate.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 28, 2018
    Applicant: Infineum International Limited
    Inventors: Philip Skinner, Daniel J. Phillips, Adam P. Marsh, Thomas D. Wilkinson
  • LUBRICATING OIL COMPOSITION
    Publication number: 20170101598
    Abstract: A lubricating oil composition for reducing low-speed pre-ignition events or improving oxidation in a spark-ignited direct injection engine is disclosed. The composition includes a detergent additive which comprises either: an oil-soluble sulfonate including both magnesium and calcium as cations; or an oil-soluble salicylate including both magnesium and calcium as cations.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 13, 2017
    Applicant: lnfineum International Limited
    Inventors: Alastair A. Cant, Adam P. Marsh, Robert W. Shaw, Thomas D. Wilkinson