Patents by Inventor Sanath V. Kumar
Sanath V. Kumar 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: 20220250005Abstract: Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described.Type: ApplicationFiled: April 28, 2022Publication date: August 11, 2022Inventors: Kenneth E. VOSS, Kevin A. HALLSTROM, Sanath V. KUMAR, Susanne STIEBELS, Marius VAARKAMP
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Patent number: 11344845Abstract: Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described.Type: GrantFiled: June 1, 2018Date of Patent: May 31, 2022Assignee: BASF CorporationInventors: Kenneth E. Voss, Kevin A. Hallstrom, Sanath V. Kumar, Susanne Stiebels, Marius Vaarkamp
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Publication number: 20180272280Abstract: Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described.Type: ApplicationFiled: June 1, 2018Publication date: September 27, 2018Inventors: Kenneth E. Voss, Kevin A. Hallstrom, Sanath V. Kumar, Susanne Stiebels, Marius Vaarkamp
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Patent number: 9993771Abstract: Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described.Type: GrantFiled: June 15, 2009Date of Patent: June 12, 2018Assignee: BASF CorporationInventors: Kenneth E. Voss, Kevin A. Hallstrom, Sanath V. Kumar, Susanne Stiebels, Marius Vaarkamp
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Publication number: 20180045097Abstract: Provided are catalyst articles, methods and systems for treating lean burn engine exhaust. Catalyst articles include selective catalytic reduction catalyst on a particulate filter. The SCR catalyst on the particulate filter provides limited NOx conversion so that unconverted NO2 is available to facilitate passive oxidation of soot trapped on the particulate filter by reaction with NO2. Systems and methods utilize such catalytic articles, and further include, e.g., a downstream selective catalytic reduction catalyst on a flow through substrate.Type: ApplicationFiled: March 18, 2016Publication date: February 15, 2018Applicant: BASF CORPORATIONInventors: Weiyong Tang, Sanath V. Kumar, Kevin A. Hallstrom, David M. Youngren, Kenneth E. Voss
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Patent number: 9863297Abstract: An emission treatment system and method for remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams are described. The emission treatment system has an oxidation catalyst upstream of a soot filter upstream from a NOx reducing catalyst.Type: GrantFiled: December 9, 2008Date of Patent: January 9, 2018Assignee: BASF CorporationInventors: Kevin A. Hallstrom, Sanath V. Kumar, Susanne Stiebels, Marius Vaarkamp
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Patent number: 9453443Abstract: Systems and methods for abating NOx in an exhaust stream are provided. System using a lean NOx trap, an air injector and optional catalysts and filters are described. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: GrantFiled: March 19, 2010Date of Patent: September 27, 2016Assignee: BASF CorporationInventors: Sanath V. Kumar, Stanley A. Roth
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Patent number: 8293182Abstract: Catalysts and catalytic articles for treating exhaust gas streams are described. In one or more embodiments, a catalyst system includes a first zone to abate nitrogen oxides by selective catalytic reduction, a second zone to oxidize ammonia and a third zone to oxidize carbon monoxide and hydrocarbons. Methods for treating the exhaust gas stream are also provided. Methods of making and using such catalysts and catalytic articles are also described.Type: GrantFiled: May 5, 2010Date of Patent: October 23, 2012Assignee: BASF CorporationInventors: R. Samuel Boorse, Matthew T. Caudle, Martin Dieterle, Sanath V. Kumar, Kenneth E. Voss
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Publication number: 20110271664Abstract: Catalysts and catalytic articles for treating exhaust gas streams are described. In one or more embodiments, a catalyst system includes a first zone to abate nitrogen oxides by selective catalytic reduction, a second zone to oxidize ammonia and a third zone to oxidize carbon monoxide and hydrocarbons. Methods for treating the exhaust gas stream are also provided. Methods of making and using such catalysts and catalytic articles are also described.Type: ApplicationFiled: May 5, 2010Publication date: November 10, 2011Applicant: BASF CorporationInventors: R. Samuel Boorse, Matthew T. Caudle, Martin Dieterle, Sanath V. Kumar, Kenneth E. Voss
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Publication number: 20100236224Abstract: Systems and methods for abating NOx in an exhaust stream are provided. System using a lean NOx trap, an air injector and optional catalysts and filters are described. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: ApplicationFiled: March 19, 2010Publication date: September 23, 2010Applicant: BASF Catalysts LLCInventors: Sanath V. Kumar, Stanley A. Roth
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Publication number: 20090288402Abstract: Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described.Type: ApplicationFiled: June 15, 2009Publication date: November 26, 2009Applicant: BASF Catalysts LLCInventors: Kenneth E. Voss, Kevin A. Hallstrom, Sanath V. Kumar, Susanne Stiebels, Marius Vaarkamp
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Publication number: 20090158719Abstract: An emission treatment system and method for remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams are described. The emission treatment system has an oxidation catalyst upstream of a soot filter upstream from a NOx reducing catalyst.Type: ApplicationFiled: December 9, 2008Publication date: June 25, 2009Applicant: BASF Catalysts LLCInventors: Kevin A. Hallstrom, Sanath V. Kumar, Susanne Stiebels, Marius Vaarkamp
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Patent number: 7524465Abstract: Provided is an exhaust article (catalyst) coated on a single substrate, such as a monolithic honeycomb having a plurality of channels along the axial length of the catalyst. Different washcoat compositions are deposited along the length the channel walls of the substrate beginning from either the inlet or outlet axial end of the substrate to form inlet and outlet catalyst layers, respectively. In the coating process, the channel walls are coated with catalyst washcoat compositions to lengths that are less than the substrates' axial length. The architecture of the resulting catalyst layers defines a plurality of zones along the length of the substrate. The properties of each zone of the catalyst can be optimized to address specific catalyst functions by manipulation of both the coating lengths and the catalyst washcoat compositions.Type: GrantFiled: July 7, 2006Date of Patent: April 28, 2009Assignee: BASF Catalysts LLCInventors: Sanath V. Kumar, Harold N. Rabinowitz, John J. Steger
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Patent number: 7506504Abstract: The present invention is directed to an emission treatment system for the treatment and/or conversion of engine emissions and particulate matter from diesel engines. The emission treatment system of the present invention comprises an upstream oxidation catalyst, a particulate filter or soot filter section and optionally a downstream catalytic element or clean-up catalyst for the treatment and/or conversion of any remaining emission gas stream contaminants.Type: GrantFiled: December 21, 2005Date of Patent: March 24, 2009Assignee: BASF Catalysts LLCInventor: Sanath V. Kumar
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Publication number: 20080072578Abstract: Emissions treatment systems and methods are disclosed, which reduce the carbon monoxide, unburned hydrocarbons, and nitrogen oxides content in the exhaust stream of an internal combustion engine adjusted to a rich combustion ratio. One embodiment of a system comprises an ammonia oxidation catalyst, a supplemental air supply for providing a lean combustion ratio, and at least one three-way catalyst. Another embodiment further comprises a second three-way catalyst located in the exhaust stream.Type: ApplicationFiled: September 20, 2007Publication date: March 27, 2008Inventor: Sanath V. Kumar
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Patent number: 7189376Abstract: Provided are coated, multi-zoned catalyst substrates that trap and combust hydrocarbon and nitrogen oxides pollutants in a single monolith substrate. In some embodiments, the multi-zoned catalysts contain both radial and axial zones. The zones can be formed by deposition of segregated coating compositions (or washcoats) containing platinum group metals and pollutant adsorbent materials to form layers along the length and radius of the honeycomb substrate. The invention also relates to exhaust gas treating systems that incorporate the multi-zoned catalysts.Type: GrantFiled: February 13, 2003Date of Patent: March 13, 2007Assignee: Engelhard CorporationInventors: Sanath V. Kumar, Harold N. Rabinowitz
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Patent number: 6727097Abstract: An article, apparatus and method for simulating poisoning and deactivating catalysts with catalyst poison compounds at least one catalyst poison compound selected from the group consisting of a compound comprising phosphorous, a compound comprising zinc compound and a compound comprising phosphorous and zinc.Type: GrantFiled: March 9, 2001Date of Patent: April 27, 2004Assignee: Engelhard CorporationInventors: Sanath V. Kumar, James Rogalo
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Publication number: 20040001782Abstract: Provided are coated, multi-zoned catalyst substrates that trap and combust hydrocarbon and nitrogen oxides pollutants in a single monolith substrate. In some embodiments, the multi-zoned catalysts contain both radial and axial zones. The zones can be formed by deposition of segregated coating compositions (or washcoats) containing platinum group metals and pollutant adsorbent materials to form layers along the length and radius of the honeycomb substrate. The invention also relates to exhaust gas treating systems that incorporate the multi-zoned catalysts.Type: ApplicationFiled: February 13, 2003Publication date: January 1, 2004Applicant: ENGELHARD CORPORATIONInventors: Sanath V. Kumar, Harold N. Rabinowitz
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Publication number: 20040001781Abstract: Provided is an exhaust article (catalyst) coated on a single substrate, such as a monolithic honeycomb having a plurality of channels along the axial length of the catalyst. Different washcoat compositions are deposited along the length the channel walls of the substrate beginning from either the inlet or outlet axial end of the substrate to form inlet and outlet catalyst layers, respectively. In the coating process, the channel walls are coated with catalyst washcoat compositions to lengths that are less than the substrates' axial length. The architecture of the resulting catalyst layers defines a plurality of zones along the length of the substrate. The properties of each zone of the catalyst can be optimized to address specific catalyst functions by manipulation of both the coating lengths and the catalyst washcoat compositions.Type: ApplicationFiled: June 27, 2002Publication date: January 1, 2004Applicant: ENGELHARD CORPORATIONInventors: Sanath V. Kumar, Harold N. Rabinowitz, John J. Steger
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Patent number: 6586254Abstract: An article, apparatus and method for simulating poisoning and deactivating catalysts with catalyst poison compounds at least one catalyst poison compound selected from the group consisting of a compound comprising phosphorous, a compound comprising zinc compound and a compound comprising phosphorous and zinc.Type: GrantFiled: June 15, 2000Date of Patent: July 1, 2003Assignee: Engelhard CorporationInventors: Sanath V. Kumar, Michel Deeba, Patrick L. Burk