Patents by Inventor David Thompsett
David Thompsett 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: 20180166695Abstract: A platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-35 at %; provided that the alloy is not 66 at % Pt20 at % Cr14 at % Ta or 50 at % Pt, 25 at % Co, 25 at % Ta is disclosed. The catalyst has particular use as an oxygen reduction catalyst in fuel cells, and in particular in phosphoric acid fuel cells.Type: ApplicationFiled: February 6, 2018Publication date: June 14, 2018Inventors: SARAH BALL, THOMAS ROBERTSON RALPH, BRIAN RONALD THEOBALD, DAVID THOMPSETT
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Publication number: 20180147569Abstract: A catalyst washcoat is provided having a molecular sieve with a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The washcoat includes one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article.Type: ApplicationFiled: January 29, 2018Publication date: May 31, 2018Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: John L. CASCI, Hai-Ying CHEN, Joseph Michael FEDEYKO, Jillian Elaine COLLIER, Raj Rao RAJARAM, David THOMPSETT, Robert P. HODGKINS
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Patent number: 9960430Abstract: A platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-35 at %; provided that the alloy is not 66 at % Pt20 at % Cr14 at % Ta or 50 at % Pt, 25 at % Co, 25 at % Ta is disclosed. The catalyst has particular use as an oxygen reduction catalyst in fuel cells, and in particular in phosphoric acid fuel cells.Type: GrantFiled: February 3, 2010Date of Patent: May 1, 2018Assignee: JOHNSON MATTHEY FUEL CELLS LIMITEDInventors: Sarah Ball, Thomas Robertson Ralph, Brian Ronald Theobald, David Thompsett
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Patent number: 9923210Abstract: A platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-35 at %; provided that the alloy is not 66 at % Pt20 at % Cr14 at % Ta or 50 at % Pt, 25 at % Co, 25 at % Ta is disclosed. The catalyst has particular use as an oxygen reduction catalyst in fuel cells, and in particular in phosphoric acid fuel cells.Type: GrantFiled: March 25, 2014Date of Patent: March 20, 2018Assignee: Johnson Matthey Fuel Cells LimitedInventors: Sarah Ball, Thomas Robertson Ralph, Brian Ronald Theobald, David Thompsett
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Publication number: 20180056239Abstract: An oxidation catalyst is described for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate, wherein the catalytic region comprises a catalytic material comprising: antimony (Sb) or an oxide thereof; a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); and a support material, which is a refractory oxide; wherein the platinum group metal (PGM) and the antimony (Sb) or an oxide thereof is each supported on the support material.Type: ApplicationFiled: August 29, 2017Publication date: March 1, 2018Inventors: Mark Robert FEAVIOUR, David THOMPSETT
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Patent number: 9878316Abstract: A catalyst washcoat is provided having a molecular sieve with a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The washcoat includes one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article.Type: GrantFiled: January 8, 2016Date of Patent: January 30, 2018Assignee: Johnson Matthey Public Limited CompanyInventors: John L. Casci, Hai-Ying Chen, Joseph Michael Fedeyko, Jillian Elaine Collier, Raj Rao Rajaram, David Thompsett, Robert P. Hodgkins
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Publication number: 20170304810Abstract: A method of coating a substrate with a foam is described. The method comprises: (a) introducing a foam into a substrate comprising a plurality of channels through open ends of the channels at a first end of the substrate; and (b) applying at least one of (i) a vacuum to open ends of the channels at a second end of the substrate and (ii) a pressure to the open ends of the channels at the first end of the substrate; wherein the foam comprises a particulate material, and wherein the foam is particle stabilized.Type: ApplicationFiled: April 10, 2017Publication date: October 26, 2017Inventors: Cecilia BERNADINI, Thomas CAMPBELL, Guy Richard CHANDLER, Christopher Daly, Katharine Ann HARDSTONE, Thomas HOTCHKISS, David THOMPSETT
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Publication number: 20170106337Abstract: An oxidation catalyst is described for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate, wherein the catalytic region comprises a catalytic material comprising: bismuth (Bi), antimony (Sb) or an oxide thereof; a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); and a support material, which is a refractory oxide: wherein the platinum group metal (PGM) is supported on the support material; and wherein the bismuth (Bi), antimony (Sb) or an oxide thereof is supported on the support material and/or the refractory oxide comprises the bismuth, antimony or an oxide thereof.Type: ApplicationFiled: October 14, 2016Publication date: April 20, 2017Inventors: Andrew Francis CHIFFEY, Oliver COOPER, Christopher DALY, Mark FEAVIOUR, Steven MERRICK, Francois MOREAU, Matthew O'BRIEN, David THOMPSETT
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Patent number: 9555371Abstract: Niobia- and tantala-doped ceria catalysts, their use in selective catalytic reduction (SCR) processes, and a compact after-treatment system for exhaust gases are disclosed. In some aspects, the catalyst comprises at least 91 wt. % of ceria and 0.1 to 9 wt. % of niobia or tantala doped on the ceria. While conventional SCR catalysts can deactivate at higher temperatures, the doped cerias, particularly ones having as little as 1 or 2 wt. % of Nb2O5 or Ta2O5, are activated toward NOx conversion by calcination. The doped cerias are also valuable for SCRF® catalyzed filter applications, including an after-treatment system that comprises a diesel particulate filter having inlets and outlets, and a dual-function catalyst coated on the inlets, outlets, or both. Compared with conventional SCR catalysts, the niobia or tantala-doped cerias enable a higher level of NO2 to be present.Type: GrantFiled: December 19, 2014Date of Patent: January 31, 2017Assignee: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, Raj Rao Rajaram, David Thompsett, Jillian Elaine Collier
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CERIUM-MODIFIED MANGANESE OCTAHEDRAL MOLECULAR SIEVES AS CATALYSTS FOR SELECTIVE CATALYTIC REDUCTION
Publication number: 20160346770Abstract: Catalysts and articles useful for selective catalytic reduction (SCR) are disclosed. The catalyst comprises a cerium oxide and an octahedral molecular sieve (OMS) comprising manganese oxide. The catalysts, which comprise 0.1 to 50 wt. % of cerium, can be made by doping, ion-exchange, deposition, or other techniques. Also disclosed is an SCR process in which a gaseous mixture comprising nitrogen oxides is selectively reduced in the presence of a reductant and the cerium-modified OMS catalyst. The cerium-modified manganese oxide OMS catalysts offer unexpected advantages for selective catalytic reduction, especially NH3-SCR, including improved thermal stability and improved activity for NOx conversion, especially at relatively low temperatures (100° C. to 250° C.).Type: ApplicationFiled: March 14, 2014Publication date: December 1, 2016Inventors: John KILMARTIN, Janet Mary FISHER, Jillian Elaine COLLIER, David THOMPSETT, Raj Rao RAJARAM -
Publication number: 20160288107Abstract: Catalysts and articles useful for selective catalytic reduction (SCR) and other exhaust gas treatments are disclosed. The catalysts comprise an octahedral molecular sieve (OMS) comprising manganese oxide and an aluminosilicate and/or silicoaluminophosphate large-pore or medium-pore molecular sieve.Type: ApplicationFiled: March 14, 2014Publication date: October 6, 2016Inventors: John KILMARTIN, Janet Mary FISHER, Jillian Elaine COLLIER, David THOMPSETT, Raj Rao RAJARAM
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Patent number: 9397348Abstract: A platinum alloy catalyst PtXY, wherein X is a transition metal (other than platinum, palladium or iridium) and Y is a transition metal (other than platinum, palladium or iridium) which is less leachable than X in an acidic environment, has an atomic percentage in the alloy of platinum is from 20.5-40at %, of X is from 40.5-78.5at % X and of Y is from 1-19.5at %.Type: GrantFiled: July 21, 2011Date of Patent: July 19, 2016Assignee: JOHNSON MATTHEY FUEL CELLS LIMITEDInventors: Brian Ronald Charles Theobald, Sarah Caroline Ball, Rachel Louise O'Malley, David Thompsett, Graham Alan Hards
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Publication number: 20160121317Abstract: A catalyst washcoat is provided having a molecular sieve with a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The washcoat includes one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article.Type: ApplicationFiled: January 8, 2016Publication date: May 5, 2016Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: John L. Casci, Hai-Ying Chen, Joseph Michael Fedeyko, Jillian Elaine Collier, Raj Rao Rajaram, David Thompsett, Robert P. Hodgkins
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Patent number: 9254481Abstract: A catalyst composition is provided having a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The catalyst composition is capable of NOx conversion at elevated temperatures. A catalytically active washcoat includes such catalyst compositions and one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article. Methods of reducing NOx employing the catalyst compositions are also provided.Type: GrantFiled: July 26, 2012Date of Patent: February 9, 2016Assignee: Johnson Matthey Public Limited CompanyInventors: John L. Casci, Hai-Ying Chen, Joseph Michael Fedeyko, Jillian Elaine Collier, Raj Rao Rajaram, David Thompsett, Robert P. Hodgkins
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Patent number: 9126192Abstract: A sol includes metal oxide nanoparticles and stabilizer ions dispersed in an aqueous liquid. The nanoparticles include a metal selected from the group of platinum, palladium, rhodium, iridium, ruthenium and osmium and the molar ratio of metal: stabilizer ions is at least 0.7. A method of preparing supported catalyst materials includes contacting the sols with support materials.Type: GrantFiled: June 17, 2005Date of Patent: September 8, 2015Assignee: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, David Thompsett
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Publication number: 20150182912Abstract: Niobia- and tantala-doped ceria catalysts, their use in selective catalytic reduction (SCR) processes, and a compact after-treatment system for exhaust gases are disclosed. In some aspects, the catalyst comprises at least 91 wt. % of ceria and 0.1 to 9 wt. % of niobia or tantala doped on the ceria. While conventional SCR catalysts can deactivate at higher temperatures, the doped cerias, particularly ones having as little as 1 or 2 wt. % of Nb2O5 or Ta2O5, are activated toward NOx conversion by calcination. The doped cerias are also valuable for SCRF® catalyzed filter applications, including an after-treatment system that comprises a diesel particulate filter having inlets and outlets, and a dual-function catalyst coated on the inlets, outlets, or both. Compared with conventional SCR catalysts, the niobia or tantala-doped cerias enable a higher level of NO2 to be present.Type: ApplicationFiled: December 19, 2014Publication date: July 2, 2015Inventors: Janet Mary FISHER, Raj Rao RAJARAM, David THOMPSETT, Jillian Elaine COLLIER
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Patent number: 8986637Abstract: An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed.Type: GrantFiled: November 6, 2013Date of Patent: March 24, 2015Assignee: Johnson Matthey Public Limited CompanyInventors: Janet Mary Fisher, David Thompsett
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Publication number: 20140205928Abstract: A platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-35 at %; provided that the alloy is not 66 at % Pt 20 at % Cr14 at % Ta or 50 at % Pt, 25 at % Co, 25 at % Ta is disclosed. The catalyst has particular use as an oxygen reduction catalyst in fuel cells, and in particular in phosphoric acid fuel cells.Type: ApplicationFiled: March 25, 2014Publication date: July 24, 2014Applicant: JOHNSON MATTHEY FUEL CELLS LIMITEDInventors: Sarah BALL, Thomas Robertson RALPH, Brian Ronald THEOBALD, David THOMPSETT
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Publication number: 20140193327Abstract: A catalyst composition is provided having a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The catalyst composition is capable of NOx conversion at elevated temperatures. A catalytically active washcoat includes such catalyst compositions and one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article. Methods of reducing NOx employing the catalyst compositions are also provided.Type: ApplicationFiled: July 26, 2012Publication date: July 10, 2014Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: John L. Casci, Hai-Ying Chen, Joseph Michael Fedeyko, Jillian Elaine Collier, Raj Rao Rajaram, David Thompsett
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Publication number: 20140154160Abstract: An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed.Type: ApplicationFiled: November 6, 2013Publication date: June 5, 2014Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Janet Mary FISHER, David THOMPSETT