Patents by Inventor Richard James Nelson

Richard James Nelson 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).

  • Low overbased alkylaryl sulfonates
    Patent number: 6551967
    Abstract: Low overbased alkaline earth metal alkylaryl sulfonate having a Total Base Number of from about 2 to about 30, a dialkylate content of 0% to about 25% and a monoalkylate content of about 75% to about 90% or more, wherein the alkylaryl moiety is alkyltoluene or alkylbenzene in which the alkyl group is a C15-C21 branched chain alkyl group derived from a propylene oligomer are useful as lubricating oil additives.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: April 22, 2003
    Assignee: Chevron Chemical S.A.
    Inventors: William Frank King, Curtis Bay Campbell, Olivier Clement, Jean-Louis Le Coent, Steven Gale Lockett, Richard James Nelson, Pierre Tequi
  • LOW OVERBASED ALKYLARYL SULFONATES
    Publication number: 20010034307
    Abstract: Low overbased alkaline earth metal alkylaryl sulfonate having a Total Base Number of from about 2 to about 30, a dialkylate content of 0% to about 25% and a monoalkylate content of about 75% to about 90% or more, wherein the alkylaryl moiety is alkyltoluene or alkylbenzene in which the alkyl group is a C15-C21 branched chain alkyl group derived from a propylene oligomer are useful as lubricating oil additives.
    Type: Application
    Filed: November 20, 1998
    Publication date: October 25, 2001
    Inventors: WILLIAM FRANK KING, CURTIS BAY CAMPBELL, OLIVIER CLEMENT, JEAN-LOUIS LECOENT, STEVEN GALE LOCKETT, RICHARD JAMES NELSON, PIERRE TEQUI