Patents by Inventor Richard Paul Redman
Richard Paul Redman 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).
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Patent number: 8252878Abstract: A novel class of polymers obtainable by copolymerising a monomer mixture comprising (i) hydrophilic monomer of general formula (I) Y—B—X; (ii) styrene or a substituted styrene, a monomer or mixture of monomers which when polymerized form a polymer with a Tg lower than the Tg of a homopolymer of monomer (I) and lower than the Tg of a homopolymer of monomer (ii); and a monomer having a crosslinkable group is described. The invention also relates to a method for producing such polymers, implants coated with the polymers and methods for forming the same.Type: GrantFiled: July 16, 2007Date of Patent: August 28, 2012Assignee: Biocompatibles UK LimitedInventors: Andrew Lennard Lewis, Sean Willis, Stephen Alister Jones, Vincent James O'Byrne, David Michael Grey, Michael John Driver, Samantha Ryan, Richard Paul Redman
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Publication number: 20090304770Abstract: A novel class of polymers obtainable by copolymerising a monomer mixture comprising (i) hydrophilic monomer of general formula (I) Y—B—X; (ii) styrene or a substituted styrene, a monomer or mixture of monomers which when polymerised form a polymer with a Tg lower than the Tg of a homopolymer of monomer (I) and lower than the Tg of a homopolymer of monomer (ii); and a monomer having a crosslinkable group is described. The invention also relates to a method for producing such polymers, implants coated with the polymers and methods for forming the same.Type: ApplicationFiled: July 16, 2007Publication date: December 10, 2009Applicant: BIOCOMPATIBLES UK LIMITEDInventors: Andrew Lennard Lewis, Sean Willis, Stephen Alister Jones, Vincent James O'Byrne, David Micheal Grey, Michael John Driver, Samantha Ryan, Richard Paul Redman
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Patent number: 7064174Abstract: A silicon containing adduct having the formula (I) wherein X is an electron withdrawing group selected from the group consisting of carbonyl and sulphone groups, sulphonium and phosphonium salts; R is selected from the group consisting of hydrogen, linear and branched alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, alkaryl, aralkyl, alkoxyaryl, alkoxyalkyl, oligoalkoxyalkyl, di-alkylaminoalkyl, N-aryl-N-alky-laminoalkyl, hydroxyalkoxy, alkoxy, alkenyloxy, alkynyloxy, cycloalkoxy, cycloalkenyloxy, cycloalkynyloxy, aralkoxy, alkoxyaryloxy, alkoxyalkoxy, oligoalkoxyalkoxy, di-alkylaminoalkoxy, N-aryl-N-alkylamino-alkoxy, acyloxy, acyloxyalkyl, N-diacyl-iminoalkyl groups, organosilane, organosiloxane, hydroxyaryl, hydroxyalkenyl, hydroxyalkynyl and hydroxy groups and any of the above groups substituted with one or more hydroxyl or xzwitterionic group Z, or R—X— is a nitrile group; R3 and R4 are individually selected from the group consisting of hydrogen, linear and branched alkyl, alkenyl,Type: GrantFiled: February 7, 2001Date of Patent: June 20, 2006Assignee: Biocompatibles UK LimitedInventors: Andrew Lennard Lewis, Anthony Claude Marie Collias, Richard Paul Redman, Jane Louise Court, Sean Leo Willis
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Patent number: 6893595Abstract: A method in which a mould is coated with a reactive polymer, a liquid curable composition is filled into the mould and cured under conditions such that the reactive polymer becomes covalently bonded to the cured bulk mould material at the interface. The reactive polymer has zwitterionic groups to confer improved biocompatibility on the moulded product. The reactive group on the reactive polymer is conveniently an ethylenically unsaturated group. The curable composition is suitably a radical polymerisable ethylenically unsaturated monomer mixture or a platinum-curable liquid silicone composition.Type: GrantFiled: July 19, 1999Date of Patent: May 17, 2005Assignee: Biocompatibles UK LimitedInventors: Andrew Victor Graham Muir, Paula Frances Lennon, Sean Leo Willis, Richard Paul Redman, Anthony Claude Marie Collias
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Patent number: 6841639Abstract: Copolymers of zwitterionic monomer, especially 2-methacryloyloxyethyl-2?-trimethylammoniumethyl phosphate inner salt, and hydrophobic comonomer, especially dodecylmethacrylate, are made in a monomer starved polymerization process in which solutions of monomers are fed to the reaction vessel in which initiator is present over an extended period. The copolymers have improved compositional uniformity and provide better coatings on a range of substrates. The novel copolymers can be distinguished from prior art batch type bulk solution polymerization polymers of the same monomer composition by solubility characteristics especially in alcohol/water mixtures. Particularly preferred coating compositions comprise an alcohol:water mixture containing around 20 to 40% by volume alcohol.Type: GrantFiled: May 30, 2000Date of Patent: January 11, 2005Assignee: Biocompatibles UK LimitedInventors: Richard Paul Redman, Laurence Gerald Hughes, Richard Neil Templar Freeman, Andrew Lennard Lewis
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Patent number: 6828029Abstract: A zwitterion containing an adduct having the formula (I) wherein Z is a zwitterionic group; X is an electron withdrawing group selected from the group consisting of carbonyl and sulphone groups, sulphonium and phosphonium salts; R is a difunctional organic group; A is O or NR6 where R6 is hydrogen or lower alkyl; R1 and R2 are independently selected from hydrogen and C1-C12 alkyl groups; and R3 is hydrogen or an organic group; R4 is an organic group, preferably an optionally substituted alkyl group, an organopolysiloxane group, an organosilyl group or an oligo alkoxyalkyl group. The invention additionally provides processes for the production of such an adduct, polymers formed therefrom, coating processes and compositions comprising an adduct or polymers produced therefrom.Type: GrantFiled: October 4, 2002Date of Patent: December 7, 2004Assignee: Biocompatibles UK LimitedInventors: Andrew Lennard Lewis, Richard Paul Redman
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Publication number: 20030152786Abstract: A silicon containing adduct having the formula (I) wherein X is an electron withdrawing group selected from the group consisting of carbonyl and sulphone groups, sulphonium and phosphonium salts; R is selected from the group consisting of hydrogen, linear and branched alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, alkaryl, aralkyl, alkoxyaryl, alkoxyalkyl, oligoalkoxyalkyl, di-alkylaminoalkyl, N-aryl-N-alky-laminoalkyl, hydroxyalkoxy, alkoxy, alkenyloxy, alkynyloxy, cycloalkoxy, cycloalkenyloxy, cycloalkynyloxy, aralkoxy, alkoxyaryloxy, alkoxyalkoxy, oligoalkoxyalkoxy, di-alkylaminoalkoxy, N-aryl-N-alkylamino-alkoxy, acyloxy, acyloxyalkyl, N-diacyl-iminoalkyl groups, organosilane, organosiloxane, hydroxyaryl, hydroxyalkenyl, hydroxyalkynyl and hydroxy groups and any of the above groups substituted with one or more hydroxyl or zwitterionic group Z, or R—X— is a nitrile group; R3 and R4 are individually selected from the group consisting of hydrogen, linear and branched alkylType: ApplicationFiled: October 9, 2002Publication date: August 14, 2003Inventors: Andrew Lennard Lewis, Anthony Claude Marie Collias, Richard Paul Redman, Jane Louise Court, Sean Leo Willis
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Patent number: 6297311Abstract: An aqueous coating composition comprising a dispersion in an aqueous medium of an acrylic addition polymer having carboxyl groups in which a proportion of the carboxyl groups are derived from a carboxyl functional chain transfer agent, the composition also comprising a base in an amount sufficient to at least partially neutralise the carboxyl groups on the polymer.Type: GrantFiled: April 6, 1998Date of Patent: October 2, 2001Assignee: PPG Industries Ohio, Inc.Inventors: James William Casper, David Robert Fenn, Richard Paul Redman