Patents by Inventor Robert M. Laurent

Robert M. Laurent 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).

  • Sulphonic acids and sulphonates
    Patent number: 4618458
    Abstract: Purification of sulphuric acid rich sulphonic acids particularly those prepared by oleum sulphonation, by water washing, treatment with an olefine and final heat treatment.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: October 21, 1986
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Robert M. Laurent, Robert Tirtiaux
  • Overbased sulphonates
    Patent number: 4259193
    Abstract: Overbased alkaline earth metal sulphonates obtained from monoalkyl orthoxylene or toluene have been found to have reduced foaming tendency as compared with corresponding benzene based sulphonates.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: March 31, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert Tirtiaux, Robert M. Laurent