Patents by Inventor Robert A. Wardle

Robert A. Wardle 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).

  • Preparation of overbased magnesium sulphonates
    Patent number: 5534168
    Abstract: The use of magnesium oxide of specified, low, reactivity in a process for the production of overbased magnesium sulphonates, together with the introduction of water and an alcohol, into the reaction mixture during carbonation, makes it possible to prepare high base number products which have very low post carbonation sediments and which can be purified by rapid filtration.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: July 9, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: John A. Cleverley, Robert A. Wardle, Joseph M. Swietlik, John F. Marsh, Jeremy R. Spencer