Patents by Inventor Shadab Mulla
Shadab Mulla 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: 10125646Abstract: An exhaust system for treating an exhaust gas produced by a diesel engine comprises: (a) an emissions control device (ECD) for oxidizing carbon monoxide (CO) and/or hydrocarbons (HCs), wherein the emissions control device comprises a platinum group metal (PGM) and a substrate, wherein the PGM is platinum, palladium or a combination thereof; (b) an injector for introducing an ammonia precursor into the exhaust gas, which is downstream of the ECD; (c) a first selective catalytic reduction (SCR) catalyst downstream of the injector, wherein the first SCR catalyst comprises a substrate and a first SCR composition, wherein the substrate is either a flow-through substrate or a filtering substrate; (d) a second SCR catalyst downstream of the first SCR catalyst, wherein the second SCR catalyst comprises a flow-through substrate and a second SCR composition; and wherein at least one of the ECD and the first SCR reduction catalyst has a filtering substrate.Type: GrantFiled: April 13, 2016Date of Patent: November 13, 2018Assignee: Johnson Matthey Public Limited CompanyInventors: Mojghan Naseri, Ceren Aydin, Shadab Mulla, Raymond Conway
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Publication number: 20180297016Abstract: Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 ?m and the second molecular sieve has a mean crystal size of about 1-5 ?m, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof.Type: ApplicationFiled: June 18, 2018Publication date: October 18, 2018Inventors: Philip Gerald BLAKEMAN, Guy Richard CHANDLER, Hai-Ying CHEN, Debnath DE, Joseph Michael Fedeyko, Alexander Nicholas Michael GREEN, Wendy MANNING, Shadab MULLA
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Patent number: 9999876Abstract: Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 ?m and the second molecular sieve has a mean crystal size of about 1-5 ?m, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof.Type: GrantFiled: March 17, 2017Date of Patent: June 19, 2018Assignee: Johnson Matthey Public Limited CompanyInventors: Philip Gerald Blakeman, Guy Richard Chandler, Hai-Ying Chen, Debnath De, Joseph Michael Fedeyko, Alexander Nicholas Michael Green, Wendy Manning, Shadab Mulla
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Publication number: 20170298796Abstract: An exhaust system for treating an exhaust gas produced by a diesel engine comprises: (a) an emissions control device (ECD) for oxidising carbon monoxide (CO) and/or hydrocarbons (HCs), wherein the emissions control device comprises a platinum group metal (PGM) and a substrate, wherein the PGM is platinum, palladium or a combination thereof; (b) an injector for introducing an ammonia precursor into the exhaust gas, which is downstream of the ECD; (c) a first selective catalytic reduction (SCR) catalyst downstream of the injector, wherein the first SCR catalyst comprises a substrate and a first SCR composition, wherein the substrate is either a flow-through substrate or a filtering substrate; (d) a second SCR catalyst downstream of the first SCR catalyst, wherein the second SCR catalyst comprises a flow-through substrate and a second SCR composition; and wherein at least one of the ECD and the first SCR reduction catalyst has a filtering substrate.Type: ApplicationFiled: April 13, 2016Publication date: October 19, 2017Inventors: Mojghan NASERI, Ceren AYDIN, Shadab MULLA, Raymond CONWAY
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Publication number: 20170182482Abstract: Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 ?m and the second molecular sieve has a mean crystal size of about 1-5 ?m, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof.Type: ApplicationFiled: March 17, 2017Publication date: June 29, 2017Inventors: Philip Gerald BLAKEMAN, Guy Richard CHANDLER, Hai-Ying CHEN, Debnath DE, Joseph Michael Fedeyko, Alexander Nicholas Michael GREEN, Wendy MANNING, Shadab MULLA
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Publication number: 20170128922Abstract: A cold start catalyst is disclosed. The cold start catalyst comprises a zeolite catalyst and a supported platinum group metal catalyst. The zeolite catalyst comprises a base metal, a noble metal, and a zeolite. The supported platinum group metal catalyst comprises one or more platinum group metals and one or more inorganic oxide carriers. The invention also includes an exhaust system comprising the cold start catalyst. The cold start catalyst and the process result in improved NOx storage and NOx conversion, improved hydrocarbon storage and conversion, and improved CO oxidation through the cold start period.Type: ApplicationFiled: January 23, 2017Publication date: May 11, 2017Inventors: Hai-Ying CHEN, Shadab Mulla
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Patent number: 9610571Abstract: Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 ?m and the second molecular sieve has a mean crystal size of about 1-5 ?m, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof.Type: GrantFiled: September 4, 2015Date of Patent: April 4, 2017Assignee: Johnson Matthey Public Limited CompanyInventors: Joseph M. Fedeyko, Hai-Ying Chen, Guy Richard Chandler, Alexander Nicholas Michael Green, Debnath De, Shadab Mulla, Wendy Manning, Philip Gerald Blakeman
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Patent number: 9358525Abstract: A NOx storage material comprises a support, a potassium salt impregnated on the support, the potassium impregnated on the support is promoted with a platinum group metal, and wherein the NOx storage material has an electrical property which changes based on the amount of NOx loading on the NOx storage material. An apparatus for direct NOx measurement includes a sensor coated with the NOx storage material. A method of determining NOx flux in a NOx containing gas comprises exposing the gas to the apparatus and converting a signal developed by the apparatus to a signal representative of the NOx flux.Type: GrantFiled: December 3, 2009Date of Patent: June 7, 2016Assignee: Johnson Matthey Public Limited CompanyInventors: Hai-Ying Chen, Shadab Mulla, Todd Howard Ballinger
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Publication number: 20150375215Abstract: Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 ?m and the second molecular sieve has a mean crystal size of about 1-5 ?m, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof.Type: ApplicationFiled: September 4, 2015Publication date: December 31, 2015Inventors: Joseph M. FEDEYKO, Hai-Ying CHEN, Guy Richard CHANDLER, Alexander Nicholas Michael GREEN, Debnath DE, Shadab MULLA, Wendy MANNING, Philip Gerald BLAKEMAN
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Patent number: 9126180Abstract: Provided is a catalyst for selective catalytic reduction of NOx in a lean-burn exhaust gas comprising a 0.8:1.0 to 1.2:1.0 blend of a metal promoted aluminosilicate having a CHA structure and a metal promoted silicoaluminophosphate having a CHA structure, respectively, wherein the silicoaluminophosphate is characterized by a higher promotion metal loading compared to the aluminosilicate.Type: GrantFiled: January 28, 2013Date of Patent: September 8, 2015Assignee: Johnson Matthey Public Limited CompanyInventors: Joseph M. Fedeyko, Hai-Ying Chen, Guy Richard Chandler, Alexander Nicholas Michael Green, Debnath De, Shadab Mulla, Wendy Manning, Philip Gerald Blakeman
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Publication number: 20150190791Abstract: Provided is a catalyst for selective catalytic reduction of NOx in a lean-burn exhaust gas comprising a 0.8:1.0 to 1.2:1.0 blend of a metal promoted aluminosilicate having a CHA structure and a metal promoted silicoaluminophosphate having a CHA structure, respectively, wherein the silicoaluminophosphate is characterized by a higher promotion metal loading compared to the aluminosilicate.Type: ApplicationFiled: January 28, 2013Publication date: July 9, 2015Inventors: Joseph M. Fedeyko, Hai-Ying Chen, Guy Richard Chandler, Alexander Nicholas Michael Green, Debnath De, Shadab Mulla, Wendy Manning, Philip Gerald Blakeman
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Publication number: 20120308439Abstract: A cold start catalyst is disclosed. The cold start catalyst comprises a zeolite catalyst and a supported platinum group metal catalyst. The zeolite catalyst comprises a base metal, a noble metal, and a zeolite. The supported platinum group metal catalyst comprises one or more platinum group metals and one or more inorganic oxide carriers. The invention also includes an exhaust system comprising the cold start catalyst. The cold start catalyst and the process result in improved NOx storage and NOx conversion, improved hydrocarbon storage and conversion, and improved CO oxidation through the cold start period.Type: ApplicationFiled: June 1, 2011Publication date: December 6, 2012Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANYInventors: Hai-Ying Chen, Shadab Mulla
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Publication number: 20100146935Abstract: A NOx storage material comprises a support, a potassium salt impregnated on the support, the potassium impregnated on the support is promoted with a platinum group metal, and wherein the NOx storage material has an electrical property which changes based on the amount of NOx loading on the NOx storage material. An apparatus for direct NOx measurement includes a sensor coated with the NOx storage material. A method of determining NOx flux in a NOx containing gas comprises exposing the gas to the apparatus and converting a signal developed by the apparatus to a signal representative of the NOx flux.Type: ApplicationFiled: December 3, 2009Publication date: June 17, 2010Applicant: Johnson Matthey Public Limited CompanyInventors: Hai-Ying Chen, Shadab Mulla, Todd Howard Ballinger