Patents by Inventor David MARVELL
David MARVELL 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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Publication number: 20240044271Abstract: The present disclosure relates to a powder coated article for filtering particulate matter from exhaust gases. The powder coated article comprises a coated monolith article, and a powder coating on the coated monolith article. The coated monolith article is a monolith article coated with an on-wall washcoat, and the powder coating comprises an inorganic particle and a silicone resin in a ratio of between 50:1 to 1:9. The present disclosure also relates to a method forming said powder coated article.Type: ApplicationFiled: July 21, 2023Publication date: February 8, 2024Inventors: Kaneshalingam ARULRAJ, Thomas HOTCHKISS, David MARVELL, Stuart REID
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Publication number: 20230076492Abstract: A method of forming an inorganic oxide coating on a monolith article is disclosed. The coated monolith article is suitable for the treatment of an exhaust gas. The method comprises spraying, as a dry particulate aerosol, inorganic particles and a silicone resin to form a coating layer. The present invention also provides an uncalcined porous monolith article for use in forming a monolith article for the treatment of an exhaust gas. The uncalcined monolith article comprises a dry particulate composition comprising inorganic particles and a silicone resin.Type: ApplicationFiled: August 17, 2022Publication date: March 9, 2023Inventors: Kaneshalingam ARULRAJ, Peter BELLHAM, Alexander DE BRUIN, Guy Richard CHANDLER, Chris CORRIGAN, David MARVELL, John TURNER
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Publication number: 20230067575Abstract: The disclosure relates to a method of forming a coated monolith article for the treatment of an exhaust gas. The method comprises the steps of: retaining a porous monolith article in a coating apparatus, the porous monolith article comprising a plurality of channels for the passage of an exhaust gas, each channel having a gas-contacting surface; depositing cementitious particles as a dry powder onto the gas-contacting surface of at least some of the channels; and reacting the cementitious particles with a liquid or gaseous reagent in situ within the porous monolith article to provide the coated monolith article.Type: ApplicationFiled: August 3, 2022Publication date: March 2, 2023Inventors: Kaneshalingam ARULRAJ, Peter BELLHAM, Guy Richard CHANDLER, Andrew CHIFFEY, Kieran COLE, Chris CORRIGAN, David MARVELL, Francois MOREAU, John TURNER
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Patent number: 11541383Abstract: A vehicular exhaust filter comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.Type: GrantFiled: November 18, 2021Date of Patent: January 3, 2023Assignee: Johnson Matthey Public Limited CompanyInventors: Peter Bellham, Andrew Chiffey, Lucy Clowes, Thomas Hotchkiss, David Marvell, John Turner, Sarah Warren
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Publication number: 20220258201Abstract: A powder spraying system comprises a source of dry powder (4), a spray nozzle (25), and a supply conduit (16) connecting the source of dry powder with the spray nozzle. The spray nozzle comprises a nozzle body (50) having a nozzle outlet (51), a first conduit (52) for dry powder, and a second conduit (53) for gas. The first conduit extends between a powder inlet (54) in communication with the supply conduit and a powder outlet (55). The second conduit extends between a gas inlet (56) and a gas outlet (57), the gas outlet being located in proximity to the powder outlet such that a gas flowing through the second conduit and out of the gas outlet produces a suction force at the powder outlet to promote flow of a dry powder through the first conduit and out of the powder outlet and the nozzle outlet. The powder outlet and the gas outlet are orientated to promote mixing of the gas with the dry powder. The first conduit (52) is a straight conduit between the powder inlet (54) and the powder outlet (55).Type: ApplicationFiled: February 2, 2022Publication date: August 18, 2022Inventors: Sabina BURMESTER, Thomas HOTCHKISS, David MARVELL, Craig THOMSON
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Publication number: 20220258150Abstract: Methods for treating a filter (2) for filtering particulate matter from exhaust gas are disclosed in which a dry powder (4) is sprayed towards an inlet face of the filter (2) entrained in a primary flow of gas to pass through the inlet face to contact a porous structure of the filter. The back pressure of the filter (2) is monitored during spraying of the dry powder (4) and the spraying of the dry powder (4) is stopped when a back pressure of the filter (2) reaches a required value. The required value may equal an absolute back pressure, or a pre-determined target back pressure for the filter minus an offset pressure, or an estimated back pressure of the filter.Type: ApplicationFiled: February 2, 2022Publication date: August 18, 2022Inventors: Sabina BURMESTER, Thomas HOTCHKISS, David MARVELL, Jonathon Paul SAPSFORD
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Publication number: 20220111376Abstract: A vehicular exhaust filter comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.Type: ApplicationFiled: November 18, 2021Publication date: April 14, 2022Inventors: Peter BELLHAM, Andrew CHIFFEY, Lucy CLOWES, Thomas HOTCHKISS, David MARVELL, John TURNER, Sarah WARREN
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Patent number: 11207667Abstract: A vehicular exhaust filter (2) comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter (2) is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.Type: GrantFiled: August 13, 2020Date of Patent: December 28, 2021Assignee: Johnson Matthey Public Limited CompanyInventors: Peter Bellham, Andrew Chiffey, Lucy Clowes, Thomas Hotchkiss, David Marvell, John Turner, Sarah Warren
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Publication number: 20210260573Abstract: A method and apparatus (1) for treating a filter (2) for filtering particulate matter from exhaust gas and a treated filter (2) are described. A reservoir (3) containing a dry powder (4) is provided. A vacuum generator (6) establishes a primary gas flow through a porous structure of the filter (2) by applying a pressure reduction to an outlet face of the filter (2). A spray device (7) receives the dry powder (4) from a transport device (8) and sprays the dry powder (4) towards the inlet face of the filter (2). A controller (9) is configured to control operation of at least the vacuum generator (6) and the spray device (7). The dry powder (4) comprises or consists of a metal compound for forming by thermal decomposition a metal oxide.Type: ApplicationFiled: February 18, 2021Publication date: August 26, 2021Inventors: Thomas HOTCHKISS, David MARVELL, John TURNER, Mark WALTON
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Publication number: 20210046467Abstract: A vehicular exhaust filter (2) comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter (2) is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.Type: ApplicationFiled: August 13, 2020Publication date: February 18, 2021Inventors: Peter BELLHAM, Andrew CHIFFEY, Lucy CLOWES, Thomas HOTCHKISS, David MARVELL, John TURNER, Sarah WARREN
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Publication number: 20210047952Abstract: A method and apparatus (1) for treating a filter (2) for filtering particulate matter from exhaust gas. A reservoir (3) containing a dry powder (4) is provided. A vacuum generator (6) establishes a primary gas flow through a porous structure of the filter (2) by applying a pressure reduction to an outlet face of the filter (2). A spray device (7) receives the dry powder (4) from a transport device (8) and sprays the dry powder (4) towards the inlet face of the filter (2). A controller (9) is configured to control operation of at least the vacuum generator (6) and the spray device (7).Type: ApplicationFiled: August 13, 2020Publication date: February 18, 2021Inventors: Sabina BURMESTER, Thomas HOTCHKISS, David MARVELL, John TURNER
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Patent number: 10808585Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow substrate having a first and a second face, and first and second pluralities of channels. The first plurality of channels is open at the first face and closed at the second face. The second plurality of channels is open at the second face and closed at the first face. The monolith filter comprises a porous substrate having a first zone extending from the first face towards the second face and a second zone extending from the second face towards the first face. Each of the zones are less that filter length. A first catalytic material is distributed throughout the first zone of the porous substrate, and a second catalytic material covers at least a portion of the surfaces in the second zone of the porous substrate and is not distributed throughout the porous substrate.Type: GrantFiled: October 26, 2017Date of Patent: October 20, 2020Assignee: Johnson Matthey Public Limited CompanyInventors: Guy Richard Chandler, Keith Anthony Flanagan, Paul Richard Phillips, David Marvell
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Patent number: 10744496Abstract: Provided is a catalyst washcoat comprising (i) a molecular sieve loaded with about 1 to about 10 weight percent of at least non-aluminum promoter metal (wherein the promoter metal weight percent is based on the weight of the molecular sieve); and (ii) about 1 to about 30 weight percent of a binder having a d90 particle size of less than 10 microns (wherein the binder weight percent is based on the total weight of the washcoat). In another aspect of the invention, the catalyst washcoat is applied to a wall-flow filter to form a catalyst article. In another aspect of the invention the catalyst article is part of an exhaust gas treatment system. And in yet another aspect of the invention, provided is a method for treating exhaust gas using the catalyst article.Type: GrantFiled: July 21, 2017Date of Patent: August 18, 2020Assignee: Johnson Matthey Public Limited CompanyInventors: Guy Chandler, Keith Flanagan, Alexander Green, David Marvell, Paul Phillips
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Patent number: 10369555Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow monolith comprising a porous substrate having surfaces that define the channels and having a first zone extending in the longitudinal direction from a first end face towards a second end face for a distance less than the filter length and a second zone extending in the longitudinal direction from the second end face towards the first end face and extending in the longitudinal direction for a distance less than the filter length, wherein a first SCR catalyst is distributed throughout the first zone of the porous substrate, an ammonia oxidation catalyst is distributed throughout the second zone of the porous substrate and a second SCR catalyst is located in a layer that covers the surfaces in the second zone of the porous substrate.Type: GrantFiled: March 20, 2018Date of Patent: August 6, 2019Assignee: Johnson Matthey Public Limited CompanyInventors: Garry Adam Burgess, Guy Richard Chandler, Keith Anthony Flanagan, David Marvell, Paul Richard Phillips
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Publication number: 20180264446Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow monolith comprising a porous substrate having surfaces that define the channels and having a first zone extending in the longitudinal direction from a first end face towards a second end face for a distance less than the filter length and a second zone extending in the longitudinal direction from the second end face towards the first end face and extending in the longitudinal direction for a distance less than the filter length, wherein a first SCR catalyst is distributed throughout the first zone of the porous substrate, an ammonia oxidation catalyst is distributed throughout the second zone of the porous substrate and a second SCR catalyst is located in a layer that covers the surfaces in the second zone of the porous substrate.Type: ApplicationFiled: March 20, 2018Publication date: September 20, 2018Inventors: Garry Adam BURGESS, Guy Richard CHANDLER, Keith Anthony FLANAGAN, David MARVELL, Paul Richard PHILLIPS
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Publication number: 20180266290Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow monolith comprising a porous substrate having surfaces that define the channels and having a first zone extending in the longitudinal direction from a first end face towards a second end face for a distance less than the filter length and a second zone downstream of the first zone, wherein a first SCR catalyst is distributed throughout the first zone of the porous substrate, and a second SCR catalyst is located on a layer that covers the surfaces in the second zone of the porous substrate. Systems and methods of using the filter in treating exhaust gases are described.Type: ApplicationFiled: March 20, 2018Publication date: September 20, 2018Inventors: Garry Adam BURGESS, Guy Richard CHANDLER, Keith Anthony FLANAGAN, James GOOGAN, David MARVELL, Paul Richard PHILLIPS
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Publication number: 20180119589Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow substrate having a first and a second face, and first and second pluralities of channels. The first plurality of channels is open at the first face and closed at the second face. The second plurality of channels is open at the second face and closed at the first face. The monolith filter comprises a porous substrate having a first zone extending from the first face towards the second face and a second zone extending from the second face towards the first face. Each of the zones are less that filter length. A first catalytic material is distributed throughout the first zone of the porous substrate, and a second catalytic material covers at least a portion of the surfaces in the second zone of the porous substrate and is not distributed throughout the porous substrate.Type: ApplicationFiled: October 26, 2017Publication date: May 3, 2018Inventors: Guy Richard CHANDLER, Keith Anthony FLANAGAN, Paul Richard PHILLIPS, David MARVELL
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Publication number: 20180021768Abstract: Provided is a catalyst washcoat comprising (i) a molecular sieve loaded with about 1 to about 10 weight percent of at least non-aluminum promoter metal (wherein the promoter metal weight percent is based on the weight of the molecular sieve); and (ii) about 1 to about 30 weight percent of a binder having a d90 particle size of less than 10 microns (wherein the binder weight percent is based on the total weight of the washcoat). In another aspect of the invention, the catalyst washcoat is applied to a wall-flow filter to form a catalyst article. In another aspect of the invention the catalyst article is part of an exhaust gas treatment system. And in yet another aspect of the invention, provided is a method for treating exhaust gas using the catalyst article.Type: ApplicationFiled: July 21, 2017Publication date: January 25, 2018Inventors: Guy Chandler, Keith Flanagan, Alexander Green, David Marvell, Paul Phillips
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Patent number: 8940259Abstract: A catalyzed soot filter for a diesel engine comprises a wall flow substrate having a substrate axial length, wherein surfaces of both the internal walls of a plurality of inlet and a plurality of outlet channels comprise a catalytic washcoat of at least one on-wall coating composition for oxidizing NO in exhaust gas to NO2, wherein the washcoat on the inlet channels extends for an axial inlet coating length from an open inlet end to a downstream inlet coating end, the washcoat on the outlet channels extends for an axial outlet coating length from an upstream outlet end to an open outlet end, the axial inlet coating length and the axial outlet coating length are both less than the substrate axial length and the outlet coating length is greater than the inlet coating length.Type: GrantFiled: October 31, 2013Date of Patent: January 27, 2015Assignee: Johnson Matthey Public Limited CompanyInventors: Gavin Michael Brown, Andrew Francis Chiffey, David Marvell
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Publication number: 20140161693Abstract: A catalysed soot filter for a diesel engine comprises a wall flow substrate having a substrate axial length, wherein surfaces of both the internal walls of a plurality of inlet and a plurality of outlet channels comprise a catalytic washcoat of at least one on-wall coating composition for oxidising NO in exhaust gas to NO2, wherein the washcoat on the inlet channels extends for an axial inlet coating length from an open inlet end to a downstream inlet coating end, the washcoat on the outlet channels extends for an axial outlet coating length from an upstream outlet end to an open outlet end, the axial inlet coating length and the axial outlet coating length are both less than the substrate axial length and the outlet coating length is greater than the inlet coating length.Type: ApplicationFiled: October 31, 2013Publication date: June 12, 2014Applicant: Johnson Matthey Public Limited CompanyInventors: Gavin Michael BROWN, Andrew Francis CHIFFEY, David MARVELL