Patents by Inventor Stuart Nicholas Richards
Stuart Nicholas Richards 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: 8987374Abstract: The present invention provides a non-aqueous composition containing a particulate solid, an organic medium and a polyurethane dispersant having an essentially linear backbone and laterally attached solvent-solubilizing side chains of a polyester, a polyether, a polyacrylate or a polyolefin including mixtures of such side chains.Type: GrantFiled: May 3, 2010Date of Patent: March 24, 2015Assignee: The Lubrizol CorporationInventors: Stuart Nicholas Richards, Andrew James Shooter
-
Patent number: 8664331Abstract: A polyurethane polymer comprising from 35% to 90% (w/w) of a poly (C2-4-alkylene oxide) based on the total weight of the polymer wherein not less than 60% by weight of the poly (C2-4-alkylene oxide) is polyethylene oxide and wherein at least 5% of the poly (C2-4-alkylene oxide) based on the total weight of the polymer is incorporated in lateral chains and which contains 10 to 180 milliequivalents of add groups for each 100 gm polymer when the polyurethane contains from 35 to 45% by weight poly (C2-4-alkylene oxide), e.g. a polymer made by reacting dimethylolpropionic acid, cyclohexane dimethanol, polypropylene glycol (1000), N-methyl pyrrolidone and an ?,?-diydroxy polyethylene glycol obtainable from 2,4-toluene diisocyanate, methoxy polyethylene glycol (750) and diethanolamine.Type: GrantFiled: November 1, 2002Date of Patent: March 4, 2014Assignee: The Lubrizol CorporationInventor: Stuart Nicholas Richards
-
Publication number: 20100216932Abstract: The present invention provides a non-aqueous composition containing a particulate solid, an organic medium and a polyurethane dispersant having an essentially linear backbone and laterally attached solvent-solubilising side chains of a polyester, a polyether, a polyacrylate or a polyolefin including mixtures of such side chains.Type: ApplicationFiled: May 3, 2010Publication date: August 26, 2010Applicant: THE LUBRIZOL CORPORATIONInventors: Stuart Nicholas Richards, Andrew James Shooter
-
Patent number: 7741404Abstract: The present invention provides a non-aqueous composition containing a particulate solid, an organic medium and a polyurethane dispersant having an essentially linear backbone and laterally attached solvent-solubilising side chains of a polyester, a polyether, a polyacrylate or a polyolefin including mixtures of such side chains.Type: GrantFiled: May 11, 2004Date of Patent: June 22, 2010Assignee: The Lubrizol CorporationInventors: Stuart Nicholas Richards, Andrew James Shooter
-
Patent number: 7732514Abstract: 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: GrantFiled: February 19, 2003Date of Patent: June 8, 2010Assignee: The Lubrizol CorporationInventors: Roger Norman Rothon, Dean Thetford, Stuart Nicholas Richards, John David Schofield
-
Publication number: 20080167423Abstract: The present invention provides a non-aqueous composition containing a particulate solid, an organic medium and a polyurethane dispersant having an essentially linear backbone and laterally attached solvent-solubilising side chains of a polyester, a polyether, a polyacrylate or a polyolefin including mixtures of such side chains.Type: ApplicationFiled: May 11, 2004Publication date: July 10, 2008Inventors: Stuart Nicholas Richards, Andrew James Shooter
-
Publication number: 20040260013Abstract: A polyurethane polymer comprising from 35% to 90% (w/w) of a poly (C2-4-alkylene oxide) based on the total weight of the polymer wherein not less than 60% by weight of the poly (C2-4-alkylene oxide) is polyethylene oxide and wherein at least 5% of the poly (C2-4-alkylene oxide) based on the total weight of the polymer is incorporated in lateral chains and which contains 10 to 180 milliequivalents of add groups for each 100 gm polymer when the polyurethane contains from 35 to 45% by weight poly (C2-4-alkylene oxide), e.g. a polymer made by reacting dimethylolpropionic acid, cyclohexane dimethanol, polypropylene glycol (1000), N-methyl pyrrolidone and an &agr;,&agr;-diydroxy polyethylene glycol obtainable from 2,4-toluene diisocyanate, methoxy polyethylene glycol (750) and diethanolamine.Type: ApplicationFiled: May 24, 2004Publication date: December 23, 2004Inventor: Stuart Nicholas Richards
-
Patent number: 6794425Abstract: A composition comprising the components: (a) a hydrophilic polymer having a number average molecular weight less than 30,000; (b) a hydrophobic polymer having a number average molecular weight more than 40,000; (c) pigment; and (d) liquid medium, and use of the composition in ink-jet printing.Type: GrantFiled: August 23, 2001Date of Patent: September 21, 2004Assignee: Avecia LimitedInventors: Gordon Lee Ellis, Paul Francis Mahon, Stephen George Yeates, Stuart Nicholas Richards, Tom Annable
-
Patent number: 6770704Abstract: 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: GrantFiled: December 5, 2002Date of Patent: August 3, 2004Assignee: Avecia LimitedInventors: David John Cartridge, Dean Thetford, John David Schofield, Paul Gough, Stuart Nicholas Richards
-
Publication number: 20030171485Abstract: 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: ApplicationFiled: December 5, 2002Publication date: September 11, 2003Inventors: David John Catridge, Dean Thetford, John David Schofield, Paul Gough, Stuart Nicholas Richards
-
Patent number: 5962609Abstract: Process for the free-radical polymerisation of olefinically unsaturated monomer(s) using a free-radical initiator, the polymerisation being performed in the presence of a compound for effecting molecular weight control, wherein the molecular weight control compound is a Co Il chelate of the following formula I ##STR1## wherein each group X, independently in each ring and in different rings, is a substituent selected from alkyl of 1 to 14 carbon atoms and cycloalkyl of 6 to 14 carbon atoms; n, independently in each ring, is 0 to 5 provided that in at least one ring, n is 1 to 5; Z, independently on each boron atom, is selected from F, Cl, Br, OH, alkoxy of 1 to 12 carbon atoms, aryloxy of 6 to 12 carbon atoms, alkyl of 1 to 12 carbon atoms, and aryl of 6 to 12 carbon atoms; or two Z groups taken together provide on one or both boron atoms a group --O--(Q)--O-- where Q is a divalent aryl or alicyclic linking group or an alkylene linking group, or two Z groups taken together on one or both boron atoms provide aType: GrantFiled: July 15, 1997Date of Patent: October 5, 1999Assignee: Zeneca LimitedInventors: David Mark Haddleton, Andrew Victor Graham Muir, Stephen William Leeming, John Patrick O'Donnell, Stuart Nicholas Richards