Patents by Inventor Martyn Vincent Twigg
Martyn Vincent Twigg 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: 10006847Abstract: An improved instrument for counting nanoparticles suspended in a gas, particularly in a combustion gas, incorporates a counter device such as a Condensation Particle Counter, incorporates a pre-treatment stage to remove substances which can cause nucleation and false results, comprising a flow through monolith carrying an oxidation catalyst and an absorber, wherein the monolith has a call density of no more than 400 cells per square inch and an open area of at least 80%.Type: GrantFiled: October 6, 2014Date of Patent: June 26, 2018Assignee: Twigg Scientific & Technical LTDInventor: Martyn Vincent Twigg
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Patent number: 9528408Abstract: An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.Type: GrantFiled: December 15, 2014Date of Patent: December 27, 2016Assignee: Johnson Matthey Public Limited CompanyInventors: Bernard Paul Gabriel Ghislain Marie Oger, Paul Richard Phillips, Martyn Vincent Twigg, Andrew Peter Walker
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Patent number: 9517454Abstract: A method of making a filter for filtering particulate matter from exhaust gas emitted from a lean-burn internal combustion engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the inlet surfaces comprise a bridge network comprising interconnected particles of refractory material over the pores of the porous structure, which method comprising the step of contacting inlet surfaces of the filter substrate with an aerosol comprising refractory material in dry powder form. The invention also relates to a filter obtainable by such method.Type: GrantFiled: May 23, 2016Date of Patent: December 13, 2016Assignee: Johnson Matthey Public Limited CompanyInventors: Neal Sutton, Martyn Vincent Twigg
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Publication number: 20160310935Abstract: A method of making a filter for filtering particulate matter from exhaust gas emitted from a lean-burn internal combustion engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the inlet surfaces comprise a bridge network comprising interconnected particles of refractory material over the pores of the porous structure, which method comprising the step of contacting inlet surfaces of the filter substrate with an aerosol comprising refractory material in dry powder form. The invention also relates to a filter obtainable by such method.Type: ApplicationFiled: May 23, 2016Publication date: October 27, 2016Inventors: NEAL SUTTON, MARTYN VINCENT TWIGG
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Publication number: 20160231221Abstract: An improved instrument for counting nanoparticles suspended in a gas, particularly in a combustion gas, incorporates a counter device such as a Condensation Particle Counter, incorporates a pre-treatment stage to remove substances which can cause nucleation and false results, comprising a flow through monolith carrying an oxidation catalyst and an absorber, wherein the monolith has a call density of no more than 400 cells per square inch and an open area of at least 80%.Type: ApplicationFiled: October 6, 2014Publication date: August 11, 2016Inventor: Martyn Vincent Twigg
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Patent number: 9352277Abstract: A method of making a filter for filtering particulate matter from exhaust gas emitted from a lean-burn internal combustion engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the inlet surfaces comprise a bridge network comprising interconnected particles of refractory material over the pores of the porous structure, which method comprising the step of contacting inlet surfaces of the filter substrate with an aerosol comprising refractory material in dry powder form. The invention also relates to a filter obtainable by such method.Type: GrantFiled: June 2, 2011Date of Patent: May 31, 2016Assignee: Johnson Matthey PLCInventors: Neal Sutton, Martyn Vincent Twigg
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Patent number: 9239019Abstract: Methods and systems are provided for passive regeneration of a particulate matter filter coupled to a gasoline engine. During vehicle deceleration conditions, an engine is operated leaner than stoichiometry over two subsequent lean phases, including an initial longer and leaner phase followed by a shorter and less lean phase. By passively regenerating the filter using intermittent lean engine operation, engine performance can be improved.Type: GrantFiled: January 26, 2012Date of Patent: January 19, 2016Assignee: Ford Global Technologies, LLCInventors: Christine Kay Lambert, Martyn Vincent Twigg
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Patent number: 9169753Abstract: A diesel engine includes an exhaust system having a particulate filter made from a porous material having a mean pore diameter of from 5 ?m to 40 ?m, a porosity of at least 40% and a bulk volumetric heat capacity of at least 0.50 J cm?3 K?1 at 500° C. The filter includes a diesel oxidation catalyst (DOC) located in a first catalyst zone on the front end of the filter and at least one catalyst zone located downstream thereof, for oxidizing carbon monoxide, hydrocarbons and nitrogen monoxide. The engine includes engine management means, in use, to provide continuously or intermittently an exhaust gas having sufficient nitrogen oxides or hydrocarbon and/or an exhaust gas of sufficiently high temperature to combust particulate matter. The platinum group metal (PGM) loading in the first catalyst zone is greater than the total PGM loading in the at least one downstream catalyst zone.Type: GrantFiled: March 5, 2004Date of Patent: October 27, 2015Assignee: Johnson Matthey Public Limited CompanyInventors: Martyn Vincent Twigg, Paul Richard Phillips
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Publication number: 20150238943Abstract: Disclosed are catalysts, and in particular catalysts including silver oxide and calcium carbonate. The catalysts may be used in the destruction of sterilants such as ozone and hydrogen peroxide. The present inventors have found that including calcium carbonate in catalysts for the destruction of sterilant substances such as ozone and peroxide enhances the performance of the catalyst and increases its lifetime. The beneficial effect of including calcium carbonate is particularly observed for catalysts including silver oxide, such as those including silver oxide and titanium dioxide.Type: ApplicationFiled: September 12, 2013Publication date: August 27, 2015Inventor: Martyn Vincent Twigg
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Patent number: 9101879Abstract: A sterilant such as ozone used for large scale decontamination of, for example, a hospital room, may be destroyed and the room made safe, by passing the atmosphere in the room over a catalyst which is silver oxide in combination with titania. The catalyst may be readily regenerated and used again.Type: GrantFiled: December 10, 2009Date of Patent: August 11, 2015Assignee: JOHNSON MATTHEY PLCInventor: Martyn Vincent Twigg
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Publication number: 20150098879Abstract: An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.Type: ApplicationFiled: December 15, 2014Publication date: April 9, 2015Inventors: Bernard Paul Gabriel Ghislain Marie OGER, Paul Richard PHILLIPS, Martyn Vincent TWIGG, Andrew Peter WALKER
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Patent number: 8925304Abstract: An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.Type: GrantFiled: June 19, 2012Date of Patent: January 6, 2015Assignee: Johnson Matthey Public Limited CompanyInventors: Bernard Paul Gabriel Ghislain Marie Oger, Paul Richard Phillips, Martyn Vincent Twigg, Andrew Peter Walker
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Publication number: 20130243659Abstract: A method of making a filter for filtering particulate matter from exhaust gas emitted from a lean-burn internal combustion engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the inlet surfaces comprise a bridge network comprising interconnected particles of refractory material over the pores of the porous structure, which method comprising the step of contacting inlet surfaces of the filter substrate with an aerosol comprising refractory material in dry powder form. The invention also relates to a filter obtainable by such method.Type: ApplicationFiled: June 2, 2011Publication date: September 19, 2013Inventors: Neal Sutton, Martyn Vincent Twigg
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Publication number: 20130192202Abstract: Methods and systems are provided for passive regeneration of a particulate matter filter coupled to a gasoline engine. During vehicle deceleration conditions, an engine is operated leaner than stoichiometry over two subsequent lean phases, including an initial longer and leaner phase followed by a shorter and less lean phase. By passively regenerating the filter using intermittent lean engine operation, engine performance can be improved.Type: ApplicationFiled: January 26, 2012Publication date: August 1, 2013Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Christine Kay Lambert, Martyn Vincent Twigg
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Patent number: 8372187Abstract: An apparatus for generating and collecting particulate matter derived from combusting a carbon-containing fuel in oxidizing gas includes a fuel burner housed in a container. The container has a gas inlet, a gas outlet; the gas outlet connects with a conduit for transporting the gas to atmosphere which is associated with means for forcing gas to flow from the gas inlet via the container and the conduit to atmosphere. Located within the conduit is a station for collecting particulate matter from gas flowing through the conduit. The gas flow-forcing means is controlled in response to a detected gas flow rate at the gas inlet to ensure the rate of gas flow at the gas inlet is maintained at a desired rate, thereby to promote particulate matter formation. A method for collecting particulate matter derived from combusting carbon-containing fuel employs the apparatus.Type: GrantFiled: April 24, 2007Date of Patent: February 12, 2013Assignee: Johnson Matthey Public Limited CompanyInventors: Jeremy Temple Gidney, Martyn Vincent Twigg
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Patent number: 8327632Abstract: An exhaust system which has a catalysed soot filter (CSF), a control unit, and a catalyzed sensor. The exhaust system, controllable by the control unit, can increase hydrocarbon (HC) and/or carbon monoxide (CO) content in an exhaust gas flowing into the CSF resulting in combustion of the HC and/or CO in the CSF, a temperature increase of the CSF, and combustion of particulate matter collected on the CSF. The catalyzed sensor is disposed between an engine manifold and the CSF, and combusts CO and/or HC in the exhaust gas and inputs the control unit with a datum correlating with an enthalpy of combustion of HC and/or CO in the exhaust gas, thereby controlling the content of the combustible HC and/or CO in the exhaust gas flowing into the CSF. The catalysed sensor is the only catalysed component in the exhaust system disposed between the engine and the CSF.Type: GrantFiled: February 13, 2007Date of Patent: December 11, 2012Assignee: Johnson Matthey Public Limited CompanyInventors: Paul Richard Phillips, Martyn Vincent Twigg
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Publication number: 20120255283Abstract: An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.Type: ApplicationFiled: June 19, 2012Publication date: October 11, 2012Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Bernard Paul Gabriel Ghislain Marie Oger, Paul Richard Phillips, Martyn Vincent Twigg, Andrew Peter Walker
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Patent number: 8220251Abstract: An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.Type: GrantFiled: November 22, 2005Date of Patent: July 17, 2012Assignee: Johnson Matthey Public Limited CompanyInventors: Bernard Paul Gabriel Ghislain Marie Oger, Paul Richard Phillips, Martyn Vincent Twigg, Andrew Peter Walker
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Patent number: 8105560Abstract: A system for treating a gas stream containing nitrogen oxides (NOx) and particulates flowing in the system comprises means for injecting a source of ammonia (NH3) or urea (CO(NH2)2) into a flowing exhaust gas upstream of a precious metal-free particulate trap, a selective catalytic reduction catalyst disposed downstream of the particulate trap and a source of ammonia or urea.Type: GrantFiled: May 29, 2009Date of Patent: January 31, 2012Assignee: Johnson Matthey Public Limited CompanyInventors: Paul Richard Phillips, Gudmund Smedler, Martyn Vincent Twigg
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Publication number: 20110300018Abstract: A sterilant such as ozone used for large scale decontamination of, for example, a hospital room, may be destroyed and the room made safe, by passing the atmosphere in the room over a catalyst which is silver oxide in combination with titania. The catalyst may be readily regenerated and used again.Type: ApplicationFiled: December 10, 2009Publication date: December 8, 2011Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventor: Martyn Vincent Twigg