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Beverley Anne Brown, Domenico Carlo Cupertino, Janos Veres, John David Schofield, Stephen William Leeming, Stephen George Yeates: Field effect transistors and materials and methods for their manufacture. Merck Patent, Morgan Lewis & Bockius, August 22, 2006: US07095044 (27 worldwide citation)

A field effect transistor in which a continuous semiconductor layer comprises: a) an organic semiconductor; and, b) an organic binder which has an inherent conductivity of less than 10−6Scm−1 and a permittivity at 1,000 Hz of less than 3.3 and a process for its production comprising: coating a subst ...


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John David Schofield, John Philip Tatum, Jill Woods: Ink jet printer ink composition. Xaar Technology, Marshall O Toole Gerstein Murray & Borun, November 17, 1998: US05837046 (24 worldwide citation)

An ink jet printer ink of the kind comprising a dispersion of a pigment in a non-aqueous diluent wherein the diluent is a single phase liquid comprising a major amount of aliphatic hydrocarbon and a minor amount of a polar component, comprising oleyl alcohol alone or in combination with a least one ...


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Dean Thetford, John David Schofield: Dispersants. Zeneca, Cushman Darby & Cushman IP Group Pillsbury Madison & Sutro, December 23, 1997: US05700395 (18 worldwide citation)

A dispersant comprising a polyethyleneimine residue carrying polyester chains derived from a caprolactone and at least one other specified lactone or hydroxycarboxylic acid.


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Peter Kingsley Davies, John David Schofield, John Michael McCarthy: Pigment composition. Zeneca, Pillsbury Madison & Sutro, March 6, 2001: US06197103 (12 worldwide citation)

A composition of copper phthalocyanines containing, on average, from 0.1 to 3 methyl groups per phthalocyanine nucleus. The composition is suitable for the coloration of paints and plastics materials.


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John David Schofield, Dean Thetford: Process. Zeneca, Pillsbury Madison & Sutro, May 19, 1998: US05753022 (6 worldwide citation)

A method of preparing a non-aqueous dispersion of CuPc which comprises milling crude CuPc in a high boiling liquid at a temperature from 50.degree. to 150.degree. C. in the presence of a polyester amine or polyesterammonium salt and a CuPc fluidising agent. Preferred polyesterammonium salt is obtain ...


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Dean Thetford, John David Schofield: Paint compositions. The Lubrizol Corporation, Samuel B Laferty, Paul N Kokulis, March 7, 2006: US07008988 (5 worldwide citation)

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 ...


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Roger Norman Rothon, Dean Thetford, Stuart Nicholas Richards, John David Schofield: Filler composites. The Lubrizol Corporation, Samuel B Laferty, Thoburn T Dunlap, June 8, 2010: US07732514 (3 worldwide citation)

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 i ...


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John David Schofield, Dean Thetford: Dispersant for dispersing particulate solids. Zeneca, Pillsbury Madison & Sutro, July 28, 1998: US05785894 (3 worldwide citation)

A dispersant for aqueous mill-bases obtainable by reacting a polyethylene glycol with a molar excess of a hydroxycarboxylic acid containing from 4 to 17 carbon atoms or lactone thereof and/or with a C.sub.3-4 -alkylene oxide to form a polymeric diol and phosphating the diol. The preferred hydroxycar ...


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John David Schofield, Paul Gough: Rheology modifier for solvent-based coatings. Zeneca, Pillsbury Madison & Sutro, September 12, 2000: US06117935 (2 worldwide citation)

A rheology modifier for solvent-based coatings which is a polyacrylic acid or a poly(C.sub.1-4)-alkyl acrylic acid wherein at least 30% of the --COOH groups are converted to ester and/or amide groups. Preferred compounds are esters of polyacrylic acid where about 50% of the --COOH groups are esterif ...