Patents by Inventor Keith Robson
Keith Robson 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: 10345296Abstract: A device for identifying the presence of a specific target molecule or biomarker by the detection of a change in an electrical property includes a measurement sensor 8 comprising a semiconducting sensor structure 12 capable of conjugating with the biomarker, thus giving rise to the said change in electrical property, and an electrode system 3, 4 for conducting a signal from the device. According to the invention there is a further such sensor 9, of substantially identical form but having its sensor structure 14 already conjugated with the biomarker, or otherwise capped, e.g. using a further oligonucleotide strand, so as to act as an internal reference. When a biological sample, e.g. saliva, is applied to the electrodes, the reference enables the discounting of all environmental effects other than the biomarker. The invention provides a simple, cheap and accurate test for one or more biomarkers that can be used in the field without complex equipment.Type: GrantFiled: August 17, 2017Date of Patent: July 9, 2019Assignee: Sapient Sensors LimitedInventors: Stephen Lee Cash, Keith Robson, Ian Anthony Kinloch, Peter George Stockley
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Publication number: 20170370918Abstract: A device for identifying the presence of a specific target molecule or biomarker by the detection of a change in an electrical property includes a measurement sensor 8 comprising a semiconducting sensor structure 12 capable of conjugating with the biomarker, thus giving rise to the said change in electrical property, and an electrode system 3, 4 for conducting a signal from the device. According to the invention there is a further such sensor 9, of substantially identical form but having its sensor structure 14 already conjugated with the biomarker, or otherwise capped, e.g. using a further oligonucleotide strand, so as to act as an internal reference. When a biological sample, e.g. saliva, is applied to the electrodes, the reference enables the discounting of all environmental effects other than the biomarker. The invention provides a simple, cheap and accurate test for one or more biomarkers that can be used in the field without complex equipment.Type: ApplicationFiled: August 17, 2017Publication date: December 28, 2017Applicant: Sapient Sensors LimitedInventors: Stephen Lee Cash, Keith Robson, Ian Anthony Kinloch, Peter George Stockley
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Patent number: 9753031Abstract: A device for identifying the presence of a specific target molecule or biomarker by the detection of a change in an electrical property includes a measurement sensor 8 comprising a semiconducting sensor structure 12 capable of conjugating with the biomarker, thus giving rise to the said change in electrical property, and an electrode system 3, 4 for conducting a signal from the device. According to the invention there is a further such sensor 9, of substantially identical form but having its sensor structure 14 already conjugated with the biomarker, or otherwise capped, e.g. using a further oligonucleotide strand, so as to act as an internal reference. When a biological sample, e.g. saliva, is applied to the electrodes, the reference enables the discounting of all environmental effects other than the biomarker. The invention provides a simple, cheap and accurate text for one or more biomarkers that can be used in the field without complex equipment.Type: GrantFiled: April 2, 2012Date of Patent: September 5, 2017Assignee: Sapient Sensors LimitedInventors: Stephen Lee Cash, Keith Robson, Ian Anthony Kinloch, Peter George Stockley
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Publication number: 20140162893Abstract: A device for identifying the presence of a specific target molecule or biomarker by the detection of a change in an electrical property includes a measurement sensor 8 comprising a semiconducting sensor structure 12 capable of conjugating with the biomarker, thus giving rise to the said change in electrical property, and an electrode system 3, 4 for conducting a signal from the device. According to the invention there is a further such sensor 9, of substantially identical form but having its sensor structure 14 already conjugated with the biomarker, or otherwise capped, e.g. using a further oligonucleotide strand, so as to act as an internal reference. When a biological sample, e.g. saliva, is applied to the electrodes, the reference enables the discounting of all environmental effects other than the biomarker. The invention provides a simple, cheap and accurate text for one or more biomarkers that can be used in the field without complex equipment.Type: ApplicationFiled: April 2, 2012Publication date: June 12, 2014Applicant: Sapient Sensors LimitedInventors: Stephen Lee Cash, Keith Robson, Ian Anthony Kinloch, Peter George Stockley
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Patent number: 5952404Abstract: An aqueous gloss emulsion paint comprises a dispersion of structured composite particles, said structured particles comprising an association of particles of inorganic pigment and polymeric particles. The polymeric particles are formed from a polymer or copolymer having a minimum film forming temperature not greater than 50.degree. C. The component particles of the composite particles are held in association as a result of surface charges on the particles said surface charges on the polymeric particles being of opposite sign to the surface charge on the particles of inorganic pigment. The ratio of polymeric particles to particles of inorganic pigment in the composite particles is from 0.5:1 to 6:1 by volume.Type: GrantFiled: December 19, 1995Date of Patent: September 14, 1999Assignee: Tioxide Group Services LimitedInventors: Leslie Ainsley Simpson, Keith Robson, Steven Hugh Ashdown, Lisa Blakey
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Patent number: 5869559Abstract: A structured composite pigmentary material comprises composite particles consisting of an association of at least one titanium dioxide particle and at least one non-film-forming organic polymer particle wherein the particles are held in association as a result of a positive surface charge on the titanium dioxide particles and a negative surface charge on the polymeric particles, the composition of the composite being such that the ratio by volume of polymeric particles to titanium dioxide particles is in the range 0.3:1 to 0.6:1. An aqueous paint composition and a method of preparing the structured composite pigmentary material are described.Type: GrantFiled: February 3, 1997Date of Patent: February 9, 1999Assignee: Tioxide Group Services LimitedInventors: Leslie Ainsley Simpson, Daniel James Rutherford, Keith Robson, Michael John Trendell
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Patent number: 5672201Abstract: A process for preparing a structured composite pigmentary material comprises forming a dispersion of uncoated particles of titanium dioxide at a pH value at which the particles have a surface charge and subjecting the dispersion to cross-flow filtration until the dispersion contains more than 50% by weight titanium dioxide. The concentrated dispersion is mixed with a dispersion of chemically distinct particles having a surface charge of opposite sign under conditions which ensure that the sign of the surface charge on either of the particulate materials is not reversed. In the resultant composite pigmentary material the titanium dioxide particles are held in association with the chemically distinct particles as a result of said surface charges.Type: GrantFiled: March 5, 1996Date of Patent: September 30, 1997Assignee: Tioxide Group Services LimitedInventors: Leslie Ainsley Simpson, Keith Robson, David Trevor Knight, Ronald Brown
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Patent number: 5643974Abstract: A process for the production of a structured composite pigmentary material in the form of a dispersion comprises mixing an aqueous dispersion of inorganic pigmentary particles and an aqueous dispersion of polyvinyl chloride (PVC) particles. The inorganic pigment particles carry a positive surface charge and the PVC particles carry a negative surface charge and the particles in the composite are held in association as a result of these charges. The inorganic pigment particles and PVC particles are mixed in the presence of a surfactant system which provides both anionic and steric stabilisation.Type: GrantFiled: February 6, 1996Date of Patent: July 1, 1997Assignee: Tioxide Group Services LimitedInventors: Leslie Ainsley Simpson, Keith Robson, David Trevor Knight, Martin Alec Williamson
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Patent number: 5622628Abstract: A novel method for the production of titanium dioxide slurries having a high solids content comprises subjecting an aqueous slurry of titanium dioxide to cross-flow filtration to produce a slurry containing at least 50%, preferably 60 to 80% titanium dioxide by weight. The slurry can be washed during filtration to reduce the concentration of soluble ions. The process can produce concentrated slurries of titanium dioxide having remarkably low viscosities.Type: GrantFiled: December 5, 1994Date of Patent: April 22, 1997Assignee: Tioxide Group Services LimitedInventors: Michael J. Trendell, Kevin Drury, Stephen R. Spruce, Martin R. B. Davis, Keith Robson
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Patent number: 5129221Abstract: A relight fuel flow schedule controls fuel flow to the combustor of a turbofan aeroengine during in-flight relight procedures. A first fuel ramp, whose slope decreases with increasing altitude, enables the combustor to light with minimum fuel flow for the altitude and thus helps to prevent overfueling. The fuel flow rate undergoes a step reduction, after detection of satisfactory combustion, to prevent compressor stall, but cannot drop below a predetermined level to guard against flameout. The first fuel ramp is repeated if satisfactory combustion does not occur. After a successive relight a second fuel ramp is varied from flat to positive slope depending on the ratio of the rate of change of high pressure compressor speed to a datum level in order to prevent a hung start and accelerate the engine until normal acceleration control laws takes over.Type: GrantFiled: May 21, 1990Date of Patent: July 14, 1992Assignee: Rolls-Royce plcInventors: Joseph H. Walker, Malcolm R. Sellar, Keith Robson, William G. Mansfield, Donald A. Yates