Patents by Inventor David Leslie Segal
David Leslie Segal 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: 8118889Abstract: A catalytic reactor (40) comprises a plurality of sheets (42) defining flow channels (44) between them. Within each flow channel (44) is a foil (46) of corrugated material whose surfaces are coated with catalytic material apart from where they contact the sheets (44). At each end of the reactor (40) are headers to supply gas mixtures to the flow channels (44), the headers communicating with adjacent channels being separate. The reactor (40) enables different gas mixtures to be supplied to adjacent channels (44), which may be at different pressures, and the corresponding chemical reactions are also different. Where one of the reactions is endothermic while the other reaction is exothermic, heat is transferred through the sheets (42) separating the adjacent channels (44), from the exothermic reaction to the endothermic reaction.Type: GrantFiled: July 9, 2002Date of Patent: February 21, 2012Assignee: CompactGTL plcInventors: Michael Joseph Bowe, David Leslie Segal, Clive Derek Lee-Tuffnell, David Charles William Blaikley, Jason Andrew Maude, John William Stairmand, Ian Frederick Zimmerman
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Patent number: 7985708Abstract: A catalyst support is made by coating a metal substrate with a solution containing a precursor for a ceramic and an amphiphilic compound, and treating the coating such that it forms a micelle structure. The coating is then treated to form a mesoporous ceramic coating on the metal substrate. The micelle structure acts as a template, so that the pores are of regular size. The active catalytic material can then be deposited in the pores. The metal substrate may for example be a corrugated foil, which can enable reaction heat to be dissipated from hot spots.Type: GrantFiled: July 7, 2006Date of Patent: July 26, 2011Assignee: CompactGTL plcInventors: Michael Joseph Bowe, David Leslie Segal
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Publication number: 20080187468Abstract: A catalyst support is made by coating a metal substrate with a solution containing a precursor for a ceramic and an amphiphilic compound, and treating the coating such that it forms a micelle structure. The coating is then treated to form a mesoporous ceramic coating on the metal substrate. The micelle structure acts as a template, so that the pores are of regular size. The active catalytic material can then be deposited in the pores. The metal substrate may for example be a corrugated foil, which can enable reaction heat to be dissipated from hot spots.Type: ApplicationFiled: July 7, 2006Publication date: August 7, 2008Applicant: COMPACTGTL PLCInventors: Michael Joseph Bowe, David Leslie Segal
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Patent number: 7074370Abstract: A plasma assisted reactor for the removal of carbonaceous combustion products or for simultaneous removal of carbonaceous products and nitrogen oxides from the exhaust emissions from an internal combustion engine, wherein the reactor includes a gas permeable bed made at least primarily of active materials comprising perovskite or vanadate.Type: GrantFiled: February 2, 2001Date of Patent: July 11, 2006Assignee: Accentus PLCInventors: David Leslie Segal, David Raybone, James Timothy Shawcross, Michael Inman
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Patent number: 7067092Abstract: A reactor chamber forms part of an exhaust system of an internal combustion engine. Within the chamber are electrodes between which there is disposed a bed of active material through which, in use, the exhaust gases pass. In the presence of an electrical discharge, driven by an electrical voltage applied across the electrodes, the active material has a catalytic action in the reduction of nitrogenous oxides in the exhaust and also acts to remove hydrocarbons from the exhaust gases.Type: GrantFiled: October 29, 2003Date of Patent: June 27, 2006Assignee: Accentus PLCInventors: Stephen Ivor Hall, David Raybone, Fiona Winterbottom, David Leslie Segal, James Timothy Shawcross, Ross Alexander Morgan, Anthony Robert Martin, Michael Inman
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Patent number: 7025939Abstract: A reactor (1) particularly for the plasma treatment of internal combustion engine exhaust gases, in which a power supply (10) and a reactor bed (2) of the dielectric barrier discharge type are connected directly and enclosed in an earthed metal chamber (17) which both isolates the high voltage power supply and acts as a Faraday cage preventing the emission of electromagnetic radiation from the power supply or plasma.Type: GrantFiled: January 18, 2000Date of Patent: April 11, 2006Assignee: Accentus PlcInventors: Stephen Ivor Hall, Michael Inman, Anthony Robert Martin, David Raybone, David Michael Weeks, David Leslie Segal
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Publication number: 20040219084Abstract: A reactor chamber forms part of an exhaust system of an internal combustion engine. Within the chamber are electrodes between which there is disposed a bed of active material through which, in use, the exhaust gases pass. In the presence of an electrical discharge, driven by an electrical voltage applied across the electrodes, the active material has a catalytic action in the reduction of nitrogenous oxides in the exhaust and also acts to remove hydrocarbons from the exhaust gases.Type: ApplicationFiled: October 29, 2003Publication date: November 4, 2004Applicant: Accentus plc.Inventors: Stephen Ivor Hall, David Raybone, Fiona Winterbottom, David Leslie Segal, James Timothy Shawcross, Ross Alexander Morgan, Anthony Robert Martin, Michael Inman
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Publication number: 20040208804Abstract: The space between parallel electrode plates (12, 13) of the reactor is dimensioned to make it possible to produce plasma at reasonable applied potential within the gas passages (15) of a monolithic substrate, such as a wallflow filter, in a slice (11) positioned between the electrode plates (12, 13).Type: ApplicationFiled: April 7, 2004Publication date: October 21, 2004Inventors: Stephen Ivor Hall, James Timothy Shawcross, Roy McAdams, David Leslie Segal, Michael Inman, Keith Morris, David Raybone, John Stedman
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Publication number: 20040081598Abstract: A reactor (1) comprises a pair of electrodes (4, 13) spaced apart to provide a path therebetween for gas flow. A permeable mass of silicon carbide 816) is provided in the space between the electrodes (4, 13) for trapping carbonaceous material in the gas flowing through the space. The silicon carbide (16) is arranged to have an electrical resistivity which is sufficiently high to permit formation, when an appropriate electrical potential is applied across the electrodes (4, 13), of a plasma in the gas within the interstices of the silicon carbide through which the gas permeates.Type: ApplicationFiled: September 3, 2003Publication date: April 29, 2004Inventors: Ross Alexander Morgan, David Leslie Segal, James Timothy Shawcross
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Publication number: 20040022701Abstract: A plasma assisted reactor for the removal of carbonaceous combustion products or for simultaneous removal of carbonaceous combustion products and nitrogen oxides from the exhaust emissions from an internal combustion engine, wherein the reactor includes a gas permeable bed made at least primarily of an active material having the general formula A1-xA1xB1-yB1yO3 or MxM11-xVO3 or M4V2O7.Type: ApplicationFiled: August 1, 2002Publication date: February 5, 2004Inventors: David Leslie Segal, David Raybone, James Timothy Shawcross, Michael Inman
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Publication number: 20020034461Abstract: A plasma assisted reactor and method for the simultaneous removal of nitrogen oxides and carbonaceous combustion products from exhaust emissions, particularly from an internal combustion engine, wherein the reactor includes a gas permeable bed made of a mixed metal oxide having the general formula A2-xA1xB1-yB1yO4.Type: ApplicationFiled: November 28, 2001Publication date: March 21, 2002Inventor: David Leslie Segal