Patents by Inventor Malcolm D. Purbrick
Malcolm D. Purbrick 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: 7087275Abstract: A coating fluid for application to a support to prepare an ink jet recording medium comprises an aqueous dispersion of a synthetic polymer hydrogel and gelatin, the amount of the synthetic polymer hydrogel being from 5 to 50% by weight of the combined weight of synthetic polymer and gelatin. Preferably the coating fluid also contains a mordant, an aliphatic alcohol to assist dispersion of the hydrogel polymer and a particulate material to impart a porous structure to the coating. The invention also provides an inkjet recording medium comprising a support on which is an ink-receiving layer comprising the gelatin and a synthetic polymer hydrogel. The amount of the latter may be from 0.3 to 5 g/square meter.Type: GrantFiled: May 30, 2002Date of Patent: August 8, 2006Assignee: Eastman Kodak CompanyInventors: Julie Baker, Malcolm D. Purbrick
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Patent number: 6866895Abstract: An image recording medium for an ink jet printer comprises(a) a sheet of solvent absorbing microporous material which comprises a matrix of substantially water insoluble thermoplastic organic polymer, finely divided substantially water insoluble filler particles of which at least 50% by weight are siliceous particles said filler particles being distributed throughout the matrix and constituting from 40 to 90% by weight of said micorporous material, there being a network of interconnecting pores communicating substantially throughout said microporous material said pores constituting from 35 to 95% by volume of said microporous material, said sheet of microporous material having (b) a coating of a polyester. The polyester can be a condensation product obtained from dicarboxylic acids and glycols and contains sufficient hydrophilic groups such as sulphonate to make it water dispersible.Type: GrantFiled: November 6, 2002Date of Patent: March 15, 2005Assignee: Eastman Kodak CompanyInventors: Julie Baker, Malcolm D. Purbrick
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Patent number: 6762006Abstract: A donor element for use in laser thermal imaging has a layer which comprises an infrared-absorbing material, an image dye and a polymer matrix comprising a thermally degradable polymer and a non thermally degradable polymer there being an interaction between the infrared-absorbing material and the non degradable polymer to facilitate retention of the infrared-absorbing material in the donor element. The degradable and non degradable polymers are preferably copolymers both of which contain methacrylic acid as a monomer. The degradable polymer is preferably a copolymer of methoxyethyl cyanoacrylate and methacrylic acid preferably in molar proportions of from 1:1 to 12:1. The non degradable polymer is preferably a copolymer of methyl methacrylate and methacrylic acid, preferably in molar proportions of from 1:1 to 15:1. The element may be prepared from an aqueous solid particle dispersion which has been prepared by milling the components together in a ball mill.Type: GrantFiled: September 25, 2002Date of Patent: July 13, 2004Assignee: Eastman Kodak CompanyInventors: Malcolm D. Purbrick, Marie C. Bunce, Phillip J. Coldrick, Danuta Gibson, Ian M. Newington, Dawn J. Jenkins
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Publication number: 20030138723Abstract: A donor element for use in laser thermal imaging has a layer which comprises an infrared-absorbing material, an image dye and a polymer matrix comprising a thermally degradable polymer and a non thermally degradable polymer there being an interaction between the infrared-absorbing material and the non degradable polymer to facilitate retention of the infrared-absorbing material in the donor element. The degradable and non degradable polymers are preferably copolymers both of which contain methacrylic acid as a monomer. The degradable polymer is preferably a copolymer of methoxyethyl cyanoacrylate and methacrylic acid preferably in molar proportions of from 1:1 to 12:1. The non degradable polymer is preferably a copolymer of methyl methacrylate and methacrylic acid, preferably in molar proportions of from 1:1 to 15:1.Type: ApplicationFiled: September 25, 2002Publication date: July 24, 2003Applicant: Eastman Kodak CompanyInventors: Malcolm D. Purbrick, Marie C. Bunce, Phillip J. Coldrick, Danuta Gibson, Ian M. Newington, Dawn J. Jenkins
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Publication number: 20030099822Abstract: An image recording medium for an ink jet printer comprises(a) a sheet of solvent absorbing microporous material which comprises a matrix of substantially water insoluble thermoplastic organic polymer, finely divided substantially water insoluble filler particles of which at least 50% by weight are siliceous particles said filler particles being distributed throughout the matrix and constituting from 40 to 90% by weight of said micorporous material, there being a network of interconnecting pores communicating substantially throughout said microporous material said pores constituting from 35 to 95% by volume of said microporous material, said sheet of microporous material having (b) a coating of a polyester. The polyester can be a condensation product obtained from dicarboxylic acids and glycols and contains sufficient hydrophilic groups such as sulphonate to make it water dispersible.Type: ApplicationFiled: November 6, 2002Publication date: May 29, 2003Applicant: Eastman Kodak CompanyInventors: Julie Baker, Malcolm D. Purbrick
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Patent number: 6534156Abstract: An image-recording element for inkjet ink images comprises a support, an ink-receptive layer and a top layer, wherein the top layer comprises a polymer that contains both a hydrophilic component and a hydrophobic component, or a mixture of two or more such polymers, the said polymer or polymer mixture being present in the top layer in an amount of from 0.003 to 0.5 g/m2, and wherein the top layer has been hardened with an oxazoline functional polymer. The top layer preferably comprises a polymer that contains both hydrophilic substituents and hydrophobic substituents, for example a polymer selected from the polymers and copolymers of acrylic acid, methacrylic acid, acrylic acid esters or methacrylic acid esters, or a salt of such a polymer or copolymer. The base layer, which may comprise gelatin, preferably has a thickness of from 3 to 20 &mgr;m. The support may be a conventional support, for example a paper sheet.Type: GrantFiled: August 15, 2000Date of Patent: March 18, 2003Assignee: Eastman Kodak CompanyInventors: Julie Baker, Malcolm D. Purbrick, Charles E. Romano, Jr.
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Publication number: 20030021963Abstract: A coating fluid for application to a support to prepare an ink jet recording medium comprises an aqueous dispersion of a synthetic polymer hydrogel and gelatin, the amount of the synthetic polymer hydrogel being from 5 to 50% by weight of the combined weight of synthetic polymer and gelatin. Preferably the coating fluid also contains a mordant, an aliphatic alcohol to assist dispersion of the hydrogel polymer and a particulate material to impart a porous structure to the coating.Type: ApplicationFiled: May 30, 2002Publication date: January 30, 2003Applicant: Eastman Kodak CompanyInventors: Julie Baker, Malcolm D. Purbrick
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Patent number: 5240586Abstract: Radiation-sensitive compositions are disclosed of a type suitable for preparing ion sensitive membranes for electrochemical ion sensors. The compositions are comprised of a radiation-sensitive polymer containing radiation-sensitive recurring units having an ionophore group and recurring units having a crosslinking group. In preparing a membrane the radiation-sensitive composition is coated onto a sensor, exposed to activating radiation to produce crosslinking in areas where the membrane structure is desired, and removed in any remaining non-exposed areas.Type: GrantFiled: February 6, 1990Date of Patent: August 31, 1993Assignee: Eastman Kodak CompanyInventors: Christopher P. Moore, Malcolm D. Purbrick, Derek A. Thomason, Kevin J. Parr
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Patent number: 5086138Abstract: A polymerizable composition comprises (a) an ethylenically unsaturated diluent monomer comprising an ethylenically unsaturated fluorine-containing monomer; (b) an ethylenically unsaturated monomer containing a reactive ester group capable of coupling with an amino group-containing compound by the formation of an amide link; and, (c) a polymerization initiator. A polymer produced from the composition is capable of immobilizing an amino group-containing compound e.g. a protein. Such polymers are suitable for use in a variety of biomedical applications.Type: GrantFiled: September 4, 1990Date of Patent: February 4, 1992Assignee: Eastman Kodak CompanyInventors: Joanna Bowen, Roderick J. W. Bowers, Malcolm D. Purbrick, Hans M. Wagner
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Patent number: 5008358Abstract: A hydrophilic crosslinkable copolymer comprising monomer units derived from an ester of an ethylenically unsaturated carboxylic acid wherein the ester group contains a labile primary hydroxyl group and monomer units derived from a halohydroxyalkyl ester of an ethylenically unsaturated carboxylic acid is disclosed. The copolymer is useful in affinity separation systems.Type: GrantFiled: September 4, 1990Date of Patent: April 16, 1991Assignee: Eastman Kodak CompanyInventors: Larry Anderson, Gregory N. Batts, Malcolm D. Purbrick, Clare E. Scriven, Stephen A. Jones
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Patent number: 4773970Abstract: An ion-sensitive electrochemical sensor comprises an electrode body having an ion-sensitive polymeric membrane coated thereon. The membrane comprises a water-insoluble copolymer having ion exchange sites and has a glass transition temperature greater than about 80.degree. C. The sensor is used to determine ion concentration by contacting it with a test solution and determining the ion concentration as a function of the potential of the electrode.Type: GrantFiled: September 2, 1986Date of Patent: September 27, 1988Assignee: Eastman Kodak CompanyInventors: Malcolm D. Purbrick, Karel L. Petrak, Derek A. Thomason