Hadden
Daniel J. Hadden, Aberdeenshire GB
Patent application number | Description | Published |
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20100262258 | BIOMEDICAL MATERIALS - The present invention provides a process for the preparation of a silicate and carbonate co-substituted calcium phosphate material. The process comprises the steps of: forming a silicon and optionally carbon-containing calcium phosphate precipitate by an aqueous precipitation method involving preparing an aqueous solution comprising phosphate ions, silicate ions, calcium ions and optionally carbonate ions, wherein the ratio of Ca/P and of Ca/(P+Si) in the solution is maintained above approximately 1.67; and heating the precipitate in an atmosphere comprising carbon and oxygen to form a silicate and carbonate co-substituted calcium phosphate material. The present invention also provides a synthetic carbonate and silicate co-substituted hydroxyapatite material, as well as a biomedical material. | 10-14-2010 |
Daniel J. Hadden, Stonehaven, Aberdeen GB
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20140348943 | BIOMEDICAL MATERIALS - The present invention provides a process for the preparation of a silicate and carbonate co-substituted calcium phosphate material. The process comprises the steps of: forming a silicon and optionally carbon-containing calcium phosphate precipitate by an aqueous precipitation method involving preparing an aqueous solution comprising phosphate ions, silicate ions, calcium ions and optionally carbonate ions, wherein the ratio of Ca/P and of Ca/(P+Si) in the solution is maintained above approximately 1.67; and heating the precipitate in an atmosphere comprising carbon and oxygen to form a silicate and carbonate co-substituted calcium phosphate material. | 11-27-2014 |
Raymond Anthony Hadden, County Durham GB
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20100229466 | OXYGEN REMOVAL - A process for reducing free oxygen in a gaseous nitrogen stream comprises the steps of | 09-16-2010 |
20140056773 | OXYGEN REMOVAL - A process for reducing free oxygen in a gaseous nitrogen stream includes the steps of (i) reforming a hydrocarbon to generate a gas mixture containing hydrogen and carbon oxides, (ii) mixing the gas mixture with a nitrogen stream containing free oxygen, and (iii) passing the resulting nitrogen gas mixture over a conversion catalyst that converts at least a portion of the free oxygen present in the nitrogen to steam wherein the hydrocarbon reforming step includes oxidation of a hydrocarbon using an oxygen-containing gas. | 02-27-2014 |
Raymond Anthony Hadden, Durham GB
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20090242462 | OXYGEN REMOVAL - A process for reducing free oxygen in a hydrocarbon gas stream comprises the steps of | 10-01-2009 |
20100028229 | OXYGEN REMOVAL - A process for reducing free oxygen in a gaseous hydrocarbon stream comprises the step of passing the gaseous hydrocarbon stream over a material comprising a metal selected from Ni, Co, Cu, Fe, Mn or Ag in a reduced state so that oxygen present in said stream reacts with the metal, wherein the metal in the reduced state is formed by, | 02-04-2010 |
William Hadden, Belfast GB
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20130263844 | SOLAR COLLECTOR - A solar collector comprises a solar absorbing tube comprising enclosure enclosing an absorbing section, comprising a radiation absorbing plate and a tube, containing a working fluid in thermal contact with the plate. The tube extends out of one end of the tube and connects with a condenser wherein the thermal transfer fluid when in a vapour phase communicates with a fluid to be heated within an end fitting. The condenser of a tube is inserted into a thermal pocket sealingly engaged with a gasket within the pipe receiving portion of the fitting, whereby heat transfer can take place between the condensers of the pipes and a fluid flowing via path in the fitting. The pocket is sealed against ingress of heat exchange fluid flowing through the fitting. | 10-10-2013 |