Patents by Inventor William D. Carlisle

William D. Carlisle 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).

  • Patent number: 5468404
    Abstract: A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyepoxide with a dispersant having at least one reactive nitrogen-containing moiety. Intermediates of the general formula IV ##STR1## where Y' is a group derived from the reaction of the polyepoxide with reactive nitrogen-containing moieties (i.e. primary or secondary amines) are novel.The process for preparing the lubricating oil soluble compounds comprises at least 2 sequential steps.Lubricating oil compositions comprises a major proportion of lubricating oil and a minor proportion of the lubricating oil soluble compounds.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: November 21, 1995
    Assignee: BP Chemicals (Additives) Limited
    Inventor: William D. Carlisle
  • Patent number: 5439603
    Abstract: A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature an epoxyacrylate with a dispersant having at least one reactive nitrogen-containing moiety.Intermediates of the general formula IV ##STR1## where Y' is a group derived from the reaction of the epoxyacrylate with reactive nitrogen-containing moieties (ie primary or secondary amines) are novel.The process for preparing the lubricating oil soluble compounds can be a one step or multistep process.Lubricating oil compositions comprise a major proportion of lubricating oil and a minor proportion of the lubricating oil soluble compounds.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: August 8, 1995
    Assignee: BP Chemicals (Additives) Limited
    Inventor: William D. Carlisle
  • Patent number: 5397489
    Abstract: A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyacrylate with a dispersant having at least one reactive nitrogen--containing moiety.Intermediates of the general formula IV ##STR1## where Y.sup.1 is a group derived from the reaction of the polyacrylate with the reactive nitrogen-containing moieties (i.e. primary or secondary amine) are novel.The process for preparing the lubricating oil soluble compounds can be a one step or multistep process.Lubricating oil compositions comprise a major proportion of lubricating oil and a minor proportion of the lubricating oil soluble compounds.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: March 14, 1995
    Assignee: BP Chemicals (Additives) Limited
    Inventor: William D. Carlisle
  • Patent number: 5234612
    Abstract: Ester derivatives useful as fuels and lubricating oil additives are prepared by the Michael addition of an alkyl acrylate to an amine to produce an intermediate ester, followed by an ester interchange with the intermediate ester to produce the final ester derivatives, some of which are novel compounds.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: August 10, 1993
    Assignee: BP Chemicals (Additives) Limited
    Inventor: William D. Carlisle
  • Patent number: 5186853
    Abstract: A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyacrylate with a dispersant having at least one reactive nitrogen--containing moiety.Intermediatese of the general formula IV ##STR1## where Y.sup.1 is a group derived from the reaction of the polyacrylate with the reactive nitrogen-containing moieties (i.e. primary or secondary amine) are novel.The process for preparing the lubricating oil soluble compounds can be a one step or multistep process.Lubricating oil compositions comprise a major proportion of lubricating oil and a minor proportion of the lubricating oil soluble compounds.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: February 16, 1993
    Assignee: BP Chemicals (Additives) Limited
    Inventor: William D. Carlisle