Patents by Inventor Dean Thetford

Dean Thetford 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).

  • Publication number: 20120192483
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Application
    Filed: January 18, 2012
    Publication date: August 2, 2012
    Applicant: The Lubrizol Corporation
    Inventors: William Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • Publication number: 20120165385
    Abstract: The invention relates to novel compounds containing a carboxylic acid head group. The invention further provides compositions containing the novel compounds, a particulate solid and an organic medium or water.
    Type: Application
    Filed: March 5, 2012
    Publication date: June 28, 2012
    Applicant: LUBRIZOL LIMITED
    Inventor: Dean Thetford
  • Publication number: 20120108722
    Abstract: The invention relates to a composition containing a particulate solid, a plastic material and a compound obtained/obtainable by a process comprising (i) reacting at a temperature of 120° C. or less, or 100° C. or less a hydroxycarboxylic acid and a lactone; and (ii) optionally reacting the product of (i) with a C1-50 carboxylic acid. The invention further relates to novel compounds, and the use of the compound as a dispersant in a plastic material.
    Type: Application
    Filed: July 7, 2010
    Publication date: May 3, 2012
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventor: Dean Thetford
  • Patent number: 8167992
    Abstract: A composition comprising a particulate Solid, an organic medium and a compound with an alkyleneoxy compound with an inorganic acidic polar head group (Z), wherein the compound is defined by Formula (1) and salts thereof: U—(Y)x-T-N(G)r(B—Z)q (Formula 1) wherein U is independently R?—N—(C)-T?-O—, or R—O—; R or R? may be the same or different and are independently H or C1-50-optionally substituted hydrocarbyl, or hydrocarbonyl group (acyl group), or the residue of an epoxide, or the residue of an optionally substituted (meth) acrylic ester or amide group; Y is C2-4-alkyleneoxy; T or T? is independently C2-4 alkylene; B is an alkylene group, such as, methylene; Z is an inorganic acidic polar head group, such as, a sulphur or phosphorus acidic polar head group; G and G? may be the same or different and are independently H or C1-50-optionally substituted hydrocarbyl or C1-50-optionally substituted hydrocarbyl or hydrocarbonyl group or the residue of an epoxide, or the residue of an optionally substituted (meth) ac
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: May 1, 2012
    Assignee: Lubrizol Limited
    Inventors: Dean Thetford, Patrick J. Sunderland, Neil L. Simpson
  • Patent number: 8168713
    Abstract: The present invention provides a dispersant of Formula (1): E-O—(Y)x-T-NR?-A-Z—W0-v, and salts thereof, wherein E is R or R—NR?-T-; R is H or C1-50-optionally substituted hydrocarbyl; R? is a residue of an optionally substituted alkyl (meth)acrylate or (meth)acrylamide, or a residue of an epoxide, or a C1-8-optionally substituted hydrocarbyl group; Y is C2-4-alkyleneoxy; T is C2-4 alkylene; A is the residue of a dibasic acid or anhydride thereof; Z is the residue of a polyamine and/or polyimine; W is the residue of an oxide, urea or dibasic acid or anhydride thereof; x is from 2 to 90; and v represents an integer variable. The invention further provides a composition comprising a particulate solid, an organic medium and/or water and the dispersant.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: May 1, 2012
    Assignee: Lubrizol Limited
    Inventor: Dean Thetford
  • Patent number: 8153570
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a lubricating composition.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: April 10, 2012
    Assignee: The Lubrizol Corporation
    Inventors: William Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • Patent number: 8133914
    Abstract: The invention relates to novel compounds containing a carboxylic acid head group. The invention further provides compositions containing the novel compounds, a particulate solid and an organic medium or water.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: March 13, 2012
    Assignee: Lubrizol Limited
    Inventor: Dean Thetford
  • Publication number: 20110319538
    Abstract: The invention relates to a composition containing a particulate solid, an organic or aqueous medium, and a compound with a head group derived from phosphoric acid. The invention further relates to novel compounds, and the use of the compound as a dispersant.
    Type: Application
    Filed: February 23, 2010
    Publication date: December 29, 2011
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Dean Thetford, Patrick J. Sunderland
  • Patent number: 8083814
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) Mannich reaction product having a tertiary amino group, said Mannich reaction product being prepared from the reaction of a hydrocarbyl-substituted phenol, an aldehyde, and amine; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: December 27, 2011
    Assignee: The Lubrizol Corporation
    Inventors: Paul R. Stevenson, Dean Thetford, Jonathan S. Vilardo
  • Patent number: 8076409
    Abstract: The present invention provides a dispersant and compositions thereof. The dispersant is a residue of a non-aromatic hydrocarbyl substituted carboxylic acid containing three or more acid groups (A), wherein the dispersant may be represented by the Formula and salts thereof: [U—(Y)x-T-N(R1)c-A]d-Z(Q1)j-Wc, wherein the variables are defined herein.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: December 13, 2011
    Assignee: Lubrizol Limited
    Inventors: Dean Thetford, Neil L. Simpson
  • Patent number: 8076378
    Abstract: A dispersant comprising a polyester chain obtainable by polymerising a hydroxy carboxylic acid or lactone thereof such as ?-caprolactone with a cyclic alkylene carbonate such as 5,5-dimethyltrimethylene carbonate. The dispersant may be in the form of a phosphate ester where the polyester chain is reacted with a phosphating agent such as polyphosphoric acid or the polyester chain may be attached to a polyamine or polyimine such as polyethyleneimine.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: December 13, 2011
    Assignee: The Lubrizol Corporation
    Inventor: Dean Thetford
  • Publication number: 20110185626
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Application
    Filed: April 13, 2011
    Publication date: August 4, 2011
    Applicant: THE LUBRIZOL CORPORATION
    Inventors: William Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • Publication number: 20110160370
    Abstract: The invention relates to a composition containing a particulate solid, a plastic material (such as a thermoplastic polymer) and a compound capable of having dispersant properties. The compound may be obtained/obtainable by reacting a fatty acid with either (i) a hydroxy-C4-5-alkylene carboxylic acid, or (ii) a lactone. The invention further relates to novel compounds, and the use of the compound as a dispersant.
    Type: Application
    Filed: August 13, 2009
    Publication date: June 30, 2011
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Patrick J. Sunderland, Dean Thetford, Thomas Forder
  • Publication number: 20110143981
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Application
    Filed: February 2, 2011
    Publication date: June 16, 2011
    Applicant: The Lubrizol Corporation
    Inventors: William Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • Publication number: 20110136953
    Abstract: The invention relates to a composition containing a particulate solid, plastic material (such as polyvinyl chloride), and a dispersant/agent comprising an oligomer from polymerizing a C7-20 hydroxycarboxylic acid optionally with a C1-6 hydroxycarboxylic acid or its corresponding lactone form.
    Type: Application
    Filed: July 30, 2009
    Publication date: June 9, 2011
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Dean Thetford, Patrick J. Sunderland, Eric L. Rohr, Jatin S. Panchal, Shelly A. Barnhart, John D. Schofield, Peter E. Bloyce
  • Publication number: 20110130317
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) Mannich reaction product having a tertiary amino group, said Mannich reaction product being prepared from the reaction of a hydrocarbyl-substituted phenol, an aldehyde, and amine; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Application
    Filed: January 31, 2011
    Publication date: June 2, 2011
    Applicant: THE LUBRIZOL CORPORATION
    Inventors: Paul R. Stevenson, Dean Thetford, Jonathan S. Vilardo
  • Patent number: 7951211
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: May 31, 2011
    Assignee: The Lubrizol Corporation
    Inventors: William Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • Patent number: 7947093
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) a hydrocarbyl substituted acylating agent and a compound having an oxygen or nitrogen atom capable of condensing with said acylating agent and further having a tertiary amino group; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: May 24, 2011
    Assignee: The Lubrizol Corporation
    Inventors: William Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • Patent number: 7906470
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) Mannich reaction product having a tertiary amino group, said Mannich reaction product being prepared from the reaction of a hydrocarbyl-substituted phenol, an aldehyde, and amine; and (b) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen and the use of such quaternary ammonium salt detergents in a fuel composition to reduce intake valve deposits.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: March 15, 2011
    Assignee: The Lubrizol Corporation
    Inventors: Paul R. Stevenson, Dean Thetford, Jonathan S. Vilardo
  • Publication number: 20110041730
    Abstract: The invention relates to a composition containing a particulate solid, a plastic material (such as a thermoplastic polymer) and a compound containing an amide group. The compound is capable of being a dispersant. The invention further relates to novel compounds, and the use of the compound as a dispersant.
    Type: Application
    Filed: January 14, 2009
    Publication date: February 24, 2011
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Dean Thetford, Patrick J. Sunderland