Patents by Inventor Wenzhong Zhang
Wenzhong Zhang 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: 12073149Abstract: Systems and methods for computing interactions of charge sources embedded in three dimensional (3D) layered media. At least one of the methods includes decomposing the Green's function representing the potential caused by a charge source into a free space component and a plurality of reaction components; generating, for each reaction component of the plurality of reaction components, a multipole expansion (ME) operator and a multipole to local (M2L) translation operator; performing, for each reaction component of the plurality of reaction components, a convergence analysis of an ME of that reaction component; defining, for each reaction component, polarization charge sources based on the convergence analysis and combining the polarization charges sources with the charge sources; and computing, using a fast multipole method (FMM), interactions of the charge sources based on the polarization charge sources, the ME operators, and the M2L translation operators.Type: GrantFiled: June 8, 2021Date of Patent: August 27, 2024Assignee: Southern Methodist UniversityInventors: Wei Cai, Bo Wang, Wenzhong Zhang
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Patent number: 12018041Abstract: A metal tin cyclized perylene diimide derivative, having a structure formula of: where R1 and R2 are each independently selected from a hydrogen atom or a group containing or not containing a substituent. The group containing or not containing a substituent is an alkyl having between 1 and 60 carbon atoms, an alkoxy having between 1 and 60 carbon atoms, a cycloalkyl having between 3 and 60 carbon atoms, an aryl having between 5 and 60 atoms, an alkylaryl having between 1 and 60 carbon atoms, an alkylheteroaryl having between 1 and 60 carbon atoms, an alkylheterocyclyl having between 1 and 60 carbon atoms, an alkyleneoxyalkyl having between 1 and 60 carbon atoms, an alkyleneoxyaryl having between 1 and 60 carbon atoms, an alkyleneoxyheteroaryl having between 1 and 60 carbon atoms, or an alkyleneoxyheterocyclyl having between 1 and 60 carbon atoms.Type: GrantFiled: December 30, 2020Date of Patent: June 25, 2024Assignee: Dalian University of TechnologyInventors: Lingcheng Chen, Wenzhong Zhang, Yi Xiao
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Patent number: 11911728Abstract: A reactor for reducing the concentration of NOx in a stream comprising: an inlet for the stream; an outlet for a stream containing a reduced concentration of NOx; one or more catalyst beds comprising a ceramic or metallic foam with a NOx reduction catalyst; one or more flow paths from the inlet to the outlet that passes through at least one catalyst bed wherein the catalyst beds are closed at the top and bottom so that the flow path through the catalyst bed passes through the sides of the catalyst bed in a lateral flow is described.Type: GrantFiled: November 22, 2021Date of Patent: February 27, 2024Assignee: SHELL USA, INC.Inventors: Wassim Klink, Guido Seng, Wenzhong Zhang, Andreas Klemt, Paul Benjerman Himelfarb
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Patent number: 11471831Abstract: A method for regenerating a deNOx catalyst includes contacting the catalyst with steam at a temperature in the range of from 250 to 390° C. The method also includes reducing the amount of nitrogen oxide components in a process gas stream that includes a) contacting the process gas with a deNOx catalyst which results in the conversion of nitrogen oxide components as well as a decline in the NOx conversion over the deNOx catalyst; and b) regenerating the deNOx catalyst to improve the NOx conversion by contacting the deNOx catalyst with steam at a temperature in the range of from 250 to 390° C.Type: GrantFiled: September 25, 2017Date of Patent: October 18, 2022Assignee: SHELL USA, INC.Inventors: Wenzhong Zhang, Geert Marten Bakker, Steven Russell Lee
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Patent number: 11449657Abstract: Area and routing overhead issues of traditional anamux incorporation in a semiconductor device are overcome by placing a functional anamux block on top of an I/O pad. In some embodiments, multiple anamux blocks can be stacked either vertically or placed on neighboring I/O pads for horizontal stacking. Embodiments provide the anamux blocks as the same width as the I/O pads and the width is optimized to minimize padring height. In some embodiments, a power/ground I/O (PGE) bond pad architecture is enabled by the incorporation of both I/O pad and anamux blocks in the same region, providing two bonding regions, which can further reduce chip area. Some embodiments also permit routing of signals through the anamux block to neighboring blocks and the I/O channels.Type: GrantFiled: December 16, 2020Date of Patent: September 20, 2022Assignee: NXP USA, Inc.Inventors: Wenzhong Zhang, Ajay Kumar Sharma, Rishi Bhooshan
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Publication number: 20220188499Abstract: Area and routing overhead issues of traditional anamux incorporation in a semiconductor device are overcome by placing a functional anamux block on top of an I/O pad. In some embodiments, multiple anamux blocks can be stacked either vertically or placed on neighboring I/O pads for horizontal stacking. Embodiments provide the anamux blocks as the same width as the I/O pads and the width is optimized to minimize padring height. In some embodiments, a power/ground I/O (PGE) bond pad architecture is enabled by the incorporation of both I/O pad and anamux blocks in the same region, providing two bonding regions, which can further reduce chip area. Some embodiments also permit routing of signals through the anamux block to neighoring blocks and the I/O channels.Type: ApplicationFiled: December 16, 2020Publication date: June 16, 2022Applicant: NXP USA, Inc.Inventors: Wenzhong Zhang, Ajay Kumar Sharma, Rishi Bhooshan
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Publication number: 20220111334Abstract: A reactor for reducing the concentration of NOx in a stream comprising: an inlet for the stream; an outlet for a stream containing a reduced concentration of NOx ; one or more catalyst beds comprising a ceramic or metallic foam with a NOx reduction catalyst; one or more flow paths from the inlet to the outlet that passes through at least one catalyst bed wherein the catalyst beds are closed at the top and bottom so that the flow path through the catalyst bed passes through the sides of the catalyst bed in a lateral flow is described.Type: ApplicationFiled: November 22, 2021Publication date: April 14, 2022Inventors: Wassim KLINK, Guido SENG, Wenzhong ZHANG, Andreas KLEMT, Paul Benjerman HIMELFARB
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Patent number: 11296716Abstract: A multi-branch analog multiplexer (anamux) includes protection circuitry to help dissipate both positive and negative injected current without increasing the size of hardening transistors in each branch, thereby avoiding increased leakage current and enabling an analog to digital converter to operate with the required accuracy. The protection circuitry is tied to the body of the hardening transistor to lower the threshold voltage of the hardening device, thereby enabling the hardening device to handle more of the injected current.Type: GrantFiled: December 4, 2020Date of Patent: April 5, 2022Assignee: NXP USA, Inc.Inventor: Wenzhong Zhang
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Publication number: 20210406414Abstract: Systems and methods for computing interactions of charge sources embedded in three dimensional (3D) layered media. At least one of the methods includes decomposing the Green's function representing the potential caused by a charge source into a free space component and a plurality of reaction components; generating, for each reaction component of the plurality of reaction components, a multipole expansion (ME) operator and a multipole to local (M2L) translation operator; performing, for each reaction component of the plurality of reaction components, a convergence analysis of an ME of that reaction component; defining, for each reaction component, polarization charge sources based on the convergence analysis and combining the polarization charges sources with the charge sources; and computing, using a fast multipole method (FMM), interactions of the charge sources based on the polarization charge sources, the ME operators, and the M2L translation operators.Type: ApplicationFiled: June 8, 2021Publication date: December 30, 2021Inventors: Wei Cai, Bo Wang, Wenzhong Zhang
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Patent number: 11192097Abstract: A catalyst for the conversion of NOX and N2O comprising iron chabazite and iron beta zeolite. A method of simultaneously reducing the NOX and N2O concentration in a process gas stream comprising contacting the process gas stream with a catalyst comprising iron chabazite and iron beta zeolite under conversion conditions.Type: GrantFiled: July 9, 2018Date of Patent: December 7, 2021Assignee: SHELL OIL COMPANYInventors: Steven Russell Lee, Wenzhong Zhang, Geert Marten Bakker
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Publication number: 20210362140Abstract: A catalyst for the conversion of NOX comprising iron chabazite and iron beta zeolite and a method of reducing the NOX concentration in a process gas stream comprising contacting the process gas stream with the catalyst. The catalyst is especially useful for high temperature deNOX conversion.Type: ApplicationFiled: July 9, 2018Publication date: November 25, 2021Inventors: Wenzhong ZHANG, Geert Marten BANKKER, Steven Russell LEE
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Patent number: 11179675Abstract: A reactor for reducing the concentration of NOx in a stream comprising: an inlet for the stream; an outlet for a stream containing a reduced concentration of NOx; one or more catalyst beds comprising a ceramic or metallic foam with a NOx reduction catalyst; one or more flow paths from the inlet to the outlet that passes through at least one catalyst bed wherein the catalyst beds are closed at the top and bottom so that the flow path through the catalyst bed passes through the sides of the catalyst bed in a lateral flow is described.Type: GrantFiled: December 20, 2016Date of Patent: November 23, 2021Assignee: SHELL OIL COMPANYInventors: Wassim Klink, Guido Seng, Wenzhong Zhang, Andreas Klemt, Paul Benjerman Himelfarb
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Publication number: 20210198292Abstract: A metal tin cyclized perylene diimide derivative, having a structure formula of: where R1 and R2 are each independently selected from a hydrogen atom or a group containing or not containing a substituent. The group containing or not containing a substituent is an alkyl having between 1 and 60 carbon atoms, an alkoxy having between 1 and 60 carbon atoms, a cycloalkyl having between 3 and 60 carbon atoms, an aryl having between 5 and 60 atoms, an alkylaryl having between 1 and 60 carbon atoms, an alkylheteroaryl having between 1 and 60 carbon atoms, an alkylheterocyclyl having between 1 and 60 carbon atoms, an alkyleneoxyalkyl having between 1 and 60 carbon atoms, an alkyleneoxyaryl having between 1 and 60 carbon atoms, an alkyleneoxyheteroaryl having between 1 and 60 carbon atoms, or an alkyleneoxyheterocyclyl having between 1 and 60 carbon atoms.Type: ApplicationFiled: December 30, 2020Publication date: July 1, 2021Inventors: Lingcheng Chen, Wenzhong Zhang, Yi Xiao
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Publication number: 20210178371Abstract: A catalyst for the conversion of NOX and N2O comprising iron chabazite and iron beta zeolite. A method of simultaneously reducing the NOX and N2O concentration in a process gas stream comprising contacting the process gas stream with a catalyst comprising iron chabazite and iron beta zeolite under conversion conditions.Type: ApplicationFiled: July 9, 2018Publication date: June 17, 2021Inventors: Steven Russell LEE, Wenzhong ZHANG, Geert Marten BAKKER
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Patent number: 11020732Abstract: A catalyst bed comprising a ceramic or metallic foam comprising one or more NOx reduction catalysts is described. A method for reducing the concentration of NOx in a dust containing gas stream comprising: a) passing a first gas stream containing NOx into a contacting zone; b) contacting the first gas stream with a ceramic or metallic foam catalyst bed having one or more flow paths through the catalyst bed wherein the ceramic or metallic foam comprises a NOx reduction catalyst to produce a second gas stream with a reduced NOx concentration; and c) passing the second gas stream out of the contacting zone wherein the first gas stream has a dust concentration of at least 5 mg/Nm3 and the pressure drop of the foam catalyst bed increases by 300% or less relative to the initial pressure drop of the foam catalyst bed due to dust accumulation, measured under the same conditions is also described.Type: GrantFiled: December 20, 2016Date of Patent: June 1, 2021Assignee: SHELL OIL COMPANYInventors: Wassim Klink, Guido Seng, Wenzhong Zhang, Andreas Klemt, Paul Benjerman Himelfarb
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Patent number: 10960352Abstract: A catalyst bed comprising a ceramic or metallic foam comprising one or more NOx reduction catalysts is described. Further, a method for reducing the concentration of NOx in a dust containing gas stream comprising: a) passing a first gas stream containing NOx into a contacting zone; b) contacting the first gas stream with a ceramic or metallic foam catalyst bed having one or more flow paths through the catalyst bed wherein the ceramic or metallic foam comprises a NOx reduction catalyst to produce a second gas stream with a reduced NOx concentration; and c) passing the second gas stream out of the contacting zone wherein the first gas stream has a dust concentration of at least 5 mg/Nm3 and the second gas stream comprises at least 50% of the amount of dust in the first gas stream.Type: GrantFiled: December 20, 2016Date of Patent: March 30, 2021Assignee: SHELL OIL COMPANYInventors: Guido Seng, Wassim Klink, Wenzhong Zhang, Andreas Klemt, Paul Benjerman Himelfarb
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Patent number: 10843132Abstract: The invention provides a method of reducing the amount of nitrogen oxide components in a process gas stream comprising: a) contacting a deNOX catalyst with the process gas in the presence of ammonia which results in the conversion of nitrogen oxide components as well as a decline in the NOX conversion over the deNOX catalyst; and b) regenerating the deNOX catalyst to improve the NOX conversion by contacting the deNOX catalyst at a temperature in the range of from 250 to 390° C. with a flow of ammonia that is reduced relative to the flow of ammonia in step a) and process gas, air or a mixture thereof.Type: GrantFiled: September 25, 2017Date of Patent: November 24, 2020Assignee: SHELL OIL COMPANYInventors: Wenzhong Zhang, Geert Marten Bakker
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Publication number: 20200260962Abstract: An apparatus for measuring cardiopulmonary data of a wearer, comprising: a sensor operable to produce a data stream indicative of movements of a wearer's body; a positioning device holding said sensor proximate an anatomical landmark on said wearer's body for conduction of mechanical vibrations from said wearer's body to said sensor; and a processor configured to receive said data stream and produce a rate signal indicative of cardiac or respiratory rate data of said wearer using an algorithm comprising peak detection;Type: ApplicationFiled: November 8, 2016Publication date: August 20, 2020Inventors: Anthony MOUCHANTAF, Miles James MONTGOMERY, Alexander Ibrahim MOSA, Firas Kamal EDDINE, Aniruddha BORAH, Wenzhong ZHANG
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Patent number: 10669907Abstract: A heater control module of the present disclosure controls exhaust temperature in an exhaust after treatment system. The heater control module includes a heating mode determination module and a heater operating module. The heating mode determination module is configured to select a desired heating mode from a plurality of heating modes based on an engine load and a status of a component of the exhaust aftertreatment system. The heater operating module is configured to operate an electric heater based on the desired heating mode. The plurality of modes includes at least a passive regeneration heating mode and an active regeneration heating mode. The electric heater is operated in the passive regeneration heating mode to heat an exhaust gas to a predetermined temperature to increase NO2 generation when an engine load is less than or equal to approximately 25%.Type: GrantFiled: July 2, 2018Date of Patent: June 2, 2020Assignee: WATLOW ELECTRIC MANUFACTURING COMPANYInventors: Wenzhong Zhang, Mike Bange, Scott Boehmer, Magdi Khair, Julian Tan
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Publication number: 20190282959Abstract: The invention provides a method of reducing the amount of nitrogen oxide components in a process gas stream comprising: a) contacting a deNOX catalyst with the process gas in the presence of ammonia which results in the conversion of nitrogen oxide components as well as a decline in the NOX conversion over the deNOX catalyst; and b) regenerating the deNOX catalyst to improve the NOX conversion by contacting the deNOX catalyst at a temperature in the range of from 250 to 390° C. with a flow of ammonia that is reduced relative to the flow of ammonia in step a) and process gas, air or a mixture thereof.Type: ApplicationFiled: September 25, 2017Publication date: September 19, 2019Inventors: Wenzhong ZHANG, Geert Marten BAKKER