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).

  • Dispersant Composition
    Publication number: 20140288227
    Abstract: A composition comprising particulate solid (typically a pigment or filler), an organic medium (typically the organic medium may be a plastics material or an organic liquid) and a polyacrylic-acid-containing copolymer.
    Type: Application
    Filed: October 25, 2012
    Publication date: September 25, 2014
    Inventors: Dean Thetford, Elliot Coulbeck, Patrick J. Sunderland
  • Dispersant Composition
    Publication number: 20140249265
    Abstract: A composition comprising particulate solid (typically a pigment or filler), an organic medium (typically the organic medium may be a plastics material or an organic liquid) and a polyacrylic copolymer.
    Type: Application
    Filed: October 25, 2012
    Publication date: September 4, 2014
    Inventors: Patrick J. Sunderland, Dean Thetford, Elliot Coulbeck, Stuart N. Richards
  • Dispersant composition
    Patent number: 8809443
    Abstract: The present invention relates to a composition containing a particulate solid, a non-polar organic medium, and a compound obtained/obtainable by reacting an aromatic amine with hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl-substituted acylating agent is selected from the group consisting of an oligomer or polymer from condensation polymerization of a hydroxy-substituted C10-30 carboxylic acid into a polyester, an optionally hydroxy-substituted C10-30 carboxylic acid, a C10-30-hydrocarbyl substituted acylating agent, and a polyolefin-substituted maleic anhydride. The invention further provides compositions for inks, thermoplastics, plasticizers, plastisols, crude grinding and flush.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: August 19, 2014
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Dean Thetford, Matthew D. Gieselman, Joanne L. Jones
  • Dispersant composition
    Patent number: 8778218
    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 or sulphuric acid. The invention further relates to novel compounds, and the use of the compound as a dispersant.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: July 15, 2014
    Assignee: Lubrizol Limited
    Inventors: Dean Thetford, Patrick J. Sunderland
  • Dispersants
    Patent number: 8772435
    Abstract: The present invention relates to dispersants for dispersing a particulate solid for millbases, paints and inks. The present invention provides a composition containing a particulate solid, a polar organic medium and a compound or salts thereof for formula T-(A)m(B)n—X—Z-Q(0-p) wherein T is hydrogen or a polymerization terminating group; A is the residue of a hydroxy carboxylic acid or lactone thereof; B is the residue of an amino carboxylic acid; X is a direct bond or a divalent group; Z is an acidic or basic group or a moiety which contains an acidic or basic group; Q is an optional residue of an oxide, urea or a dibasic acid or anhydride thereof; m and n are positive integers; and p represents the number of residual amino and/or imino groups in Z.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: July 8, 2014
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Neil L. Simpson, Dean Thetford
  • Polyester Quaternary Salt and Compositions Thereof
    Publication number: 20140114019
    Abstract: The invention relates to a composition containing a particulate solid; an organic medium; and a quaternised polyester salt which comprises a product obtained/obtainable by reaction of (i) a polyester containing a tertiary amino group; and (ii) a quaternising agent suitable for converting the tertiary amino group to a quaternary nitrogen, wherein the quaternising agent is a hydrocarbyl epoxide in combination with an acid, or mixtures thereof. The invention further relates to the use of the product as a dispersant. The invention further relates to the use of the dispersant in media, such as inks, mill bases, plastics and paints.
    Type: Application
    Filed: May 4, 2012
    Publication date: April 24, 2014
    Applicant: LUBRIZOL CORPORATION
    Inventors: Dean Thetford, David J. Moreton, Hannah Greenfield, Joanne L. Jones
  • Dispersant composition
    Patent number: 8703850
    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: Grant
    Filed: February 23, 2010
    Date of Patent: April 22, 2014
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Dean Thetford, Patrick J. Sunderland
  • Lubricating Compositions Containing Salts of Hydrocarbyl Substituted Acylating Agents
    Publication number: 20140107002
    Abstract: The present invention provides a composition and a concentrate, comprising: (a) a major amount of an oil of lubricating viscosity, (b) a quaternary ammonium salt of a hydrocarbyl-substituted acylating agent condensation product, and (c) an optional amount of a succinimide dispersant different from (b), and a use of the composition or concentrate for lubricating an engine. In a further embodiment, the invention provides the use of a quaternary ammonium salt of a hydrocarbyl-substituted acylating agent condensation product as a dispersant in a lubricating composition, and as a synergistic dispersant combination with a different succinimide dispersant.
    Type: Application
    Filed: June 18, 2012
    Publication date: April 17, 2014
    Applicant: The Lubrizol Corporation
    Inventors: Joanne L. Jones, Dean Thetford, David J. Moreton, Matthew D. Gieselman
  • Lubricating Composition Containing a Dispersant
    Publication number: 20140107003
    Abstract: The invention provides a lubricating composition containing a lubricating composition comprising an oil of lubricating viscosity and a quaternised polyester salt. The invention further relates to a method of lubricating a mechanical device (such as an internal combustion engine) with the lubricating composition. The invention further relates to the use of the quaternised polyester salt as a dispersant.
    Type: Application
    Filed: June 18, 2012
    Publication date: April 17, 2014
    Inventors: Matthew D. Gieselman, Joanne L. Jones, David J. Moreton, Dean Thetford, Hannah Greenfield
  • Polymeric coupling agents
    Patent number: 8664350
    Abstract: The invention relates to a composition containing a particulate solid, a plastic material and a compound. The invention further relates to novel compounds, and the use of the coupling agents.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: March 4, 2014
    Assignee: Lubrizol Limited
    Inventor: Dean Thetford
  • FUEL ADDITIVE CONTAINING A DISPERSION OF IRON PARTICLES AND AN AMMONIUM POLYESTER DETERGENT
    Publication number: 20140033604
    Abstract: A composition contains an additive for assisting with the regeneration of the PF in the form of an organic dispersion of iron particles and a detergent including a polyester quaternary ammonium salt.
    Type: Application
    Filed: December 19, 2011
    Publication date: February 6, 2014
    Applicants: THE LUBRIZOL CORPORATION, RHODIA OPERATIONS
    Inventors: Lauriane D'Alencon, Michael Lallemand, Virginie Harle, David J. Moreton, Malcolm G.J. MacDuff, Magali Pudlarz, Hannah Greenfield, Dean Thetford, Joanne L. Jones
  • Thermoplastic Composition
    Publication number: 20140005316
    Abstract: The invention relates to a composition containing a particulate solid, a plastic material (such as a thermoplastic polymer) and a hydrogenated vegetable oil wax. The hydrogenated vegetable oil wax is capable of being a dispersant.
    Type: Application
    Filed: December 19, 2011
    Publication date: January 2, 2014
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Dean Thetford, Patrick J. Sunderland
  • Dispersants
    Patent number: 8613799
    Abstract: The present invention relates to dispersants containing at least two lipophilic groups (e.g., alkenyl-substituted acylating agent, such as, dodecyl succinic anhydride), and the dispersants contain a hydrophilic component (e.g., alkylene glycol, polyalkylene glycol) present in an amount sufficient to at least partially disperse the amphiphilic compound in aqueous media (e.g., 30 wt % to 80 wt %). The invention further provides for dispersants as phosphate, sulphonate, and phosphite derivatives thereof. The invention further provides for the use of the dispersants in tinter compositions (e.g., universal tinter) and reduced shade paints.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: December 24, 2013
    Assignee: Lubrizol Limited
    Inventors: Dean Thetford, John J. Mullay, Christopher J. Kolp, Rita A. Sweet
  • Acid endcapped caprolactone or valerolactone dispersing agents
    Patent number: 8604112
    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: Grant
    Filed: August 13, 2009
    Date of Patent: December 10, 2013
    Assignee: The Lubrizol Corporation
    Inventors: Patrick J. Sunderland, Dean Thetford, Thomas Forder
  • Polyester Quaternary Ammonium Salts
    Publication number: 20130239468
    Abstract: The invention relates to polyester quaternary ammonium salts, including amine, amide, and ester salts, processes for making them, and their use as additives, including their use in fuels, such as diesel fuel and fuel oils. The invention particularly relates to the use of polyester quaternary ammonium salts as detergents in fuels and the methods of making them.
    Type: Application
    Filed: November 21, 2011
    Publication date: September 19, 2013
    Applicant: THE LUBRIZOL CORPORATION
    Inventors: Hannah Greenfield, Dean Thetford, David J. Moreton
  • Thermoplastic composition
    Patent number: 8524818
    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: Grant
    Filed: January 14, 2009
    Date of Patent: September 3, 2013
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Dean Thetford, Patrick J. Sunderland
  • Quaternary ammonium salt detergents for use in lubricating compositions
    Patent number: 8476207
    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, a fuel composition.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: July 2, 2013
    Inventors: William R. S. Barton, Mark C. Davies, David J. Moreton, Paul R. Stevenson, Dean Thetford
  • DISPERSANT COMPOSITION
    Publication number: 20130059969
    Abstract: The present invention relates to a composition containing a particulate solid, a non-polar organic medium, and a compound obtained/obtainable by reacting an aromatic amine with hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl-substituted acylating agent is selected from the group consisting of an oligomer or polymer from condensation polymerisation of a hydroxy-substituted C10-30 carboxylic acid into a polyester, an optionally hydroxy-substituted C10-30 carboxylic acid, a C10-30-hydrocarbyl substituted acylating agent, and a polyolefin-substituted maleic anhydride. The invention further provides compositions for inks, thermoplastics, plasticisers, plastisols, crude grinding and flush.
    Type: Application
    Filed: May 16, 2011
    Publication date: March 7, 2013
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Dean Thetford, Matthew D. Gieselman, Joanne L. Jones
  • DISPERSANT COMPOSITION
    Publication number: 20130041082
    Abstract: The invention relates to a composition containing a particulate solid, an organic medium, and a (meth)acrylic polymer. The invention further relates to novel compounds, and the use of the (meth)acrylic polymer as a dispersant, typically a pigment dispersant.
    Type: Application
    Filed: April 21, 2011
    Publication date: February 14, 2013
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Patrick J. Sunderland, Dean Thetford, John D. Schofield
  • Dispersants
    Patent number: RE44769
    Abstract: A dispersant of general Formula I T—(A)n(B)p—Z??(1) wherein T is hydrogen or a polymerisation terminating group; Z is an acidic or basic group or a moiety containing either an acidic or basic group; A and B are each, independently, oxyalkylene carbonyl groups derivable from ?-valerolactone, ?-caprolactone or alkyl substituted ?-caprolactone provided that both are not ?-caprolactone or ?-valerolactone; n and p are integers; and n+p is from 2 to 100; including salts thereof. Specific examples of dispersants are the reaction product of lauric acid, ?-caprolactone, 7-methyl-?-caprolactone with PEI, the reaction product of lauric acid, ?-caprolactone, ?-valerolactone with PEI and the phosphate of the reaction product of dodecanol, ?-caprolactone and ?-valerolactone.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: February 18, 2014
    Assignee: The Lubrizol Corporation
    Inventors: Dean Thetford, John David Schofield, Patrick John Sunderland