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: 20080207828
    Abstract: The present invention provides a composition containing a particulate solid, an organic medium and/or water and a compound of Formula (1) and salts thereof: Formula (1) wherein R and R? are independently H or Cl-30-optionally substituted hydrocarbyl; or R is H or Cl-30-optionally substituted hydrocarbyl and R? is R? C=O (an acyl group where R? is hydrogen, alkyl or an optionally substituted alkyl or aryl or an optionally substituted aryl); 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, or mixtures thereof; x is from 2 to 90; and v represents the maximum available number of amino and/or imino groups in Z which does not carry the group RR?N-T-O-(Y)X-T-NH-A-.
    Type: Application
    Filed: December 6, 2005
    Publication date: August 28, 2008
    Applicant: NOVEON, INC.
    Inventor: Dean Thetford
  • Publication number: 20080163790
    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 polymerisation 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: Application
    Filed: April 7, 2006
    Publication date: July 10, 2008
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Neil L. Simpson, Dean Thetford
  • Publication number: 20080127857
    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: Application
    Filed: February 1, 2008
    Publication date: June 5, 2008
    Applicant: THE LUBRIZOL CORPORATION
    Inventor: Dean Thetford
  • Publication number: 20080125540
    Abstract: The present invention provides a composition containing a particulate solid, an organic medium and/or water and a compound of Formula (1) and salts thereof; wherein R is C1-50-optionally substituted hydrocarbyl; Y is C2-4-alkyleneoxy; T is C2-4alkylene; 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 60; and v represents the maximum available number of amino and/or imino groups in Z which does not carry the group RO—(Y)x-T-NH-A-. The invention further discloses the composition as a dispersant for an organic media.
    Type: Application
    Filed: July 14, 2004
    Publication date: May 29, 2008
    Applicant: THE LUBRIZOL CORPORATION
    Inventor: Dean Thetford
  • Publication number: 20080113890
    Abstract: A quaternary ammonium salt detergent made from the reaction product of the reaction of: (a) polyalkene-substituted amine having at least one 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: November 9, 2006
    Publication date: May 15, 2008
    Applicant: The Lubrizol Corporation
    Inventors: David J. Moreton, Paul R. Stevenson, Dean Thetford, Jonathan S. Vilardo
  • Publication number: 20080103234
    Abstract: The present invention provides a dispersant of formula (1): T-V-(A)n, —U-Z-W, Formula (1) wherein, T is a polymerisation terminating group; V is a direct bond or divalent linking group; A is the residue of one or more different hydroxy carboxylic acids or lactones thereof, U is a direct bond or a divalent linkage; Z is the residue of a polyamine or polyimine; W is the residue of an oxide or urea; m is from 2 to 2000; and x is from 1 up to the maximum number of available amino and/or imino groups in Z which do not carry the group T-V-(A)n, —U—.
    Type: Application
    Filed: December 6, 2005
    Publication date: May 1, 2008
    Applicant: NOVEON, INC.
    Inventor: Dean Thetford
  • Patent number: 7361692
    Abstract: A dispersant comprising a polyester chain obtainable by polymerising a hydroxy carboxylic acid or lactone thereof such as E-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: March 15, 2002
    Date of Patent: April 22, 2008
    Assignee: The Lubrizol Corporation
    Inventor: Dean Thetford
  • Patent number: 7348367
    Abstract: Basic and acid dispersants derived from branched alkyl aliphatic acids and alcohols and one or more hydroxy carboxylic acid or lactone to give a polyoxyalkylenecarbonyl chain (POAC) having a terminal carboxylic acid group (TPOAC acid) or terminal hydroxy group (TPOAC alcohol). Preferred basic dispersants are obtained by reaching one or more TPOAC acids with a polyamine or polyimine such as polyethyleneimine and preferred anionic dispersants are prepared by forming a phosphate ester of a TPOAC alcohol.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: March 25, 2008
    Assignee: The Lubrizol Corporation
    Inventors: Dean Thetford, Patrick John Sunderland, Tom Annable
  • Publication number: 20080052985
    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: September 1, 2006
    Publication date: March 6, 2008
    Applicant: THE LUBRIZOL CORPORATION
    Inventors: Paul R. Stevenson, Dean Thetford, Jonathan S. Vilardo
  • Publication number: 20060189502
    Abstract: Dispersions useful in making capacitors, printed circuit boards, etc., comprising an electronic particulate solid, a carrier and a dispersant of formula (1): R—(O-A-CO)x(O—B—CO)y-Z wherein R is hydrogen or a polymerisation terminating group; A is C8-20-alkylene and/or C8-20-alkenylene; B is C1-6-alkylene or a lactone thereof; Z is hydroxyl or a basic group or a moiety containing a basic group; x is from 2 to 45; Y is from 0 to 15; and the ration of x:y is not less than 3:1, the carrier is a high boiling organic liquid having a boiling point between 150 and 350° C. selected from monohydric alcohols and esters of dialkylene glycol monoalkyl esters.
    Type: Application
    Filed: March 5, 2004
    Publication date: August 24, 2006
    Inventors: Dean Thetford, John Schofield
  • Patent number: 7008988
    Abstract: A paint comprising a film-forming resin, an organic liquid, a pigment and a dispersant of formula 1, including salts thereof (T-(O-A-CO)n(O-B-CO)mpZ wherein T is H or a polymerisation terminating group; A is C16-20-alkenylene; B is C10-20-alkylene; Z is the residue of a polyamine or polyimine; n is 2 to 50; m is 0 to 25; and p is not less than 2. Preferred dispersants are derived from poly(ricinoleic acid) and polyethylene imine.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: March 7, 2006
    Assignee: The Lubrizol Corporation
    Inventors: Dean Thetford, John David Schofield
  • Publication number: 20050256226
    Abstract: A dispersant which comprises the reaction product of a phosphating agent such as polyphosphoric acid and a compound of formula R—OH wherein R is a residue of a polyester and/or polyether having a polymerisation terminating group and where the ratio of each phosphorus atom of the phosphating agent to RO—H is from 1.3:1 to 3:1. The dispersants are thought to be pyrophosphates.
    Type: Application
    Filed: February 18, 2003
    Publication date: November 17, 2005
    Inventors: Dean Thetford, John Schofield, Neil Simpson
  • Publication number: 20050165144
    Abstract: A composition comprising a plastics material, an inorganic particulate solid such as aluminium trihydrate and a coupling modified of formula A-(X—Y—CO)m(O—B—CO)nOH wherein A is a moiety containing a terminating ethylenic group with one or two adjacent carbonyl groups; X is a direct bond, O or N; Y is C1-18-alkylene or C2-18-alkenylene; B is C2-6-alkylene; m is from 1 to 4 and n is from 0 to 5 provided that when A contains two carbonyl groups adjacent to the ethylenic group then X is N. Specific examples of coupling modifiers are ?-carboxyl ethylacrylate and 5-carboxy pentyl maleimide.
    Type: Application
    Filed: February 19, 2003
    Publication date: July 28, 2005
    Inventors: Roger Rothon, Dean Thetford, Stuart Richards, John Schofield
  • Patent number: 6884286
    Abstract: A dispersion comprising a particulate solid, a polar organic liquid and a dispersant of formula (1) wherein R is optionally substituted C4-50-hydrocarbyl; X is —O—, —S— or —NR2—; R1 is hydrogen or C1-6, -alkyl which may be linear or branched; R2 is hydrogen or C1-6, alkyl which may be linear or branched or a group —(C2H4O)n(AO)p—R1; AO is alkyleneoxy containing 3 or more carbon atoms; n is 0 to 30; p is 4 to 100; and p>n; and a is from 1 to 3. Preferred compounds are where R1 is hydrogen, X is —O— and a is 1 and R is the residue of 2-naphthol.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: April 26, 2005
    Assignee: The Lubrizol Corporation
    Inventor: Dean Thetford
  • Patent number: 6787628
    Abstract: A polymer comprising the addition reaction product of a polyisocyanate having a functionality of from 2 to 10 and a succinylpolyether having a C6-30-alk(en)yl group and at least one group which is capable of reacting with the polyisocyanate and where the number of recurring ethyleneoxy groups in the polyether is from 4 to 800.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: September 7, 2004
    Assignee: Avecia Limited
    Inventors: Dean Thetford, Stuart Barnett
  • Patent number: 6787600
    Abstract: A dispersant which comprises a polyamine (eg polyallylamine) or polyimine (eg polyethyleneimine) backbone chain containing side chains of two or more different types of polyester chain wherein at least one type of polyester chain is derivable from one or more hydroxy carboxylic acids all of which contain a C1-8-alkylene group or lactone thereof such as &egr;-caprolactone and/or &dgr;-valerolactone and at least one other type of polyester chain derivable from one or more hydroxy carboxylic acids wherein at least one of the hydroxy carboxylic acids contains a C8-30-alkylene chain (e.g 12-hydroxystearic acid) or a C8-30-alkenylene chain (eg ricinoleic acid) or lactone thereof.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: September 7, 2004
    Assignee: The Lubrizol Corporation
    Inventors: Dean Thetford, Ian Donald Maxwell, Lindsay Anne Slater
  • Patent number: 6770704
    Abstract: The use of an amine functional polymer, including salts thereof, as a rheology modifier for solvent-based paints, inks, filled thermosetting resins and thermosetting resin-based gelcoats whereby the amine functional polymer contains not less that 42% by weight of the residue of one or more amine-containing monomers, or salts thereof, relative to the weight of the polymer. Preferably the amine functional polymer is obtainable from two or more monomers which contain at least one ethylenically unsaturated group such as styrene and 2-dimethylaminoethylmethacrylate.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: August 3, 2004
    Assignee: Avecia Limited
    Inventors: David John Cartridge, Dean Thetford, John David Schofield, Paul Gough, Stuart Nicholas Richards
  • Publication number: 20040112250
    Abstract: A dispersant comprising a polyester chain obtainable by polymerising a hydroxy carboxylic acid or lactone thereof such as E-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: Application
    Filed: October 7, 2003
    Publication date: June 17, 2004
    Inventor: Dean Thetford
  • Publication number: 20040116568
    Abstract: A paint comprising a film-forming resin, an organic liquid, a pigment and a dispersant of formula 1, including salts thereof
    Type: Application
    Filed: January 23, 2004
    Publication date: June 17, 2004
    Inventors: Dean Thetford, John David Schofield
  • Patent number: 6743855
    Abstract: A polyester of general formula 1 RO&Brketopenst;(A)(B)&Brketclosest;nCox  1 and its use as Association Thickener in aqueous media such as paints and inks; wherein R is hydrogen or a polymerization terminating group; A is a residue of a poly-C2-6-alkyleneglycol containing not less than 80% by weight polyethyleneglycol such as polyethyleneglycol with number average MW from 200 to 35,000; B is the residue of C4-50-alk(en)yl succinic acid such as C14-alkylsuccinic acid; X is hydroxy, a group ROA—, a group —OR1, —NHR1 or —O− M+, R1 is C1-18-alk(en)yl; M+ is a metal cation, and n is from 2 to 100.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: June 1, 2004
    Assignee: Avecia Limited
    Inventors: Dean Thetford, Stuart Barnett