Patents by Inventor Mohammed Heddadj

Mohammed Heddadj 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).

  • Process for preparing polyalkenylsuccinimides
    Patent number: 7091306
    Abstract: The present invention relates to an improved process for preparing polyalkenylsuccinimides having a sediment level less than 0.1 vol % comprising the steps of: (a) preparing a polyalkenyl derivative of an unsaturated acidic reagent by (i) reacting a polyalkylene with an unsaturated acidic reagent in the absence of a strong acid until at least 25% of the polyalkylene is converted to a polyalkenyl derivative of an unsaturated acidic reagent; (ii) continuing the reaction with an excess of the unsaturated acidic reagent in the presence of a strong acid to convert at least some of the unreacted polyalkylene to additional polyalkenyl derivative of an unsaturated acidic reagent; and (iii) removing the unreacted unsaturated acidic reagent; (b) reacting the unfiltered product of step (a) with a polyamine having at least one basic nitrogen atom; (c) diluting the product of step (b); and (d) subsequently filtering the polyalkenylsuccinimide product.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: August 15, 2006
    Assignees: Chevron Oronite Company LLC, Chevron Oronite S. A.
    Inventors: Mohammed Heddadj, William R. Ruhe, Jr., Gilles P. Sinquin
  • Process for preparing polyalkenylsuccinimides
    Publication number: 20040225105
    Abstract: The present invention relates to an improved process for preparing polyalkenylsuccinimides having a sediment level less than 0.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 11, 2004
    Inventors: Mohammed Heddadj, William R. Ruhe, Gilles P. Sinquin