Patents by Inventor Jiangbo Gan
Jiangbo Gan 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: 20230288429Abstract: Methods for identifying compounds that modulate cellular responses stimulated by IgE, which include providing an impedance-based system that monitors cell-substrate impedance of cells on a substrate; introducing cells to the substrate of the system; adding at least one test compound and IgE to the cells, wherein the at least one test compound is suspected of modulating cell responses stimulated by the IgE; adding an antigen to the cells; monitoring the cell-substrate impedance of cells on the substrate; and analyzing the cell-substrate impedance to evaluate whether the at least one test compound alters a cellular response to stimulation with the IgE.Type: ApplicationFiled: March 8, 2023Publication date: September 14, 2023Inventors: Xiao Xu, Yama A. Abassi, Xiaobo Wang, Jiangbo Gan
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Publication number: 20230145666Abstract: Methods for identifying compounds that modulate cellular responses stimulated by IgE, which include providing an impedance-based system that monitors cell-substrate impedance of cells on a substrate; introducing cells to the substrate of the system; adding at least one test compound and IgE to the cells, wherein the at least one test compound is suspected of modulating cell responses stimulated by the IgE; adding an antigen to the cells; monitoring the cell-substrate impedance of cells on the substrate; and analyzing the cell-substrate impedance to evaluate whether the at least one test compound alters a cellular response to stimulation with the IgE.Type: ApplicationFiled: January 10, 2023Publication date: May 11, 2023Inventors: Xiao Xu, Yama A. Abassi, Xiaobo Wang, Jiangbo Gan
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Patent number: 11604197Abstract: Methods for identifying compounds that modulate cellular responses stimulated by IgE, which include providing an impedance-based system that monitors cell-substrate impedance of cells on a substrate; introducing cells to the substrate of the system; adding at least one test compound and IgE to the cells, wherein the at least one test compound is suspected of modulating cell responses stimulated by the IgE; adding an antigen to the cells; monitoring the cell-substrate impedance of cells on the substrate; and analyzing the cell-substrate impedance to evaluate whether the at least one test compound alters a cellular response to stimulation with the IgE.Type: GrantFiled: March 27, 2020Date of Patent: March 14, 2023Assignee: Agilent Technologies, Inc.Inventors: Xiao Xu, Yama A. Abassi, Xiaobo Wang, Jiangbo Gan
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Publication number: 20200348312Abstract: Methods for identifying compounds that modulate cellular responses stimulated by IgE, which include providing an impedance-based system that monitors cell-substrate impedance of cells on a substrate; introducing cells to the substrate of the system; adding at least one test compound and IgE to the cells, wherein the at least one test compound is suspected of modulating cell responses stimulated by the IgE; adding an antigen to the cells; monitoring the cell-substrate impedance of cells on the substrate; and analyzing the cell-substrate impedance to evaluate whether the at least one test compound alters a cellular response to stimulation with the IgE.Type: ApplicationFiled: March 27, 2020Publication date: November 5, 2020Inventors: Xiao Xu, Yama A. Abassi, Xiaobo Wang, Jiangbo Gan
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Patent number: 10690677Abstract: Methods for identifying compounds that modulate cellular responses stimulated by IgE, which include providing an impedance-based system that monitors cell-substrate impedance of cells on a substrate; introducing cells to the substrate of the system; adding at least one test compound and IgE to the cells, wherein the at least one test compound is suspected of modulating cell responses stimulated by the IgE; adding an antigen to the cells; monitoring the cell-substrate impedance of cells on the substrate; and analyzing the cell-substrate impedance to evaluate whether the at least one test compound alters a cellular response to stimulation with the IgE.Type: GrantFiled: April 13, 2017Date of Patent: June 23, 2020Assignee: ACEA Biosciences, Inc.Inventors: Xiao Xu, Yama A. Abassi, Xiaobo Wang, Jiangbo Gan
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Publication number: 20170315131Abstract: Methods for identifying compounds that modulate cellular responses stimulated by IgE, which include providing an impedance-based system that monitors cell-substrate impedance of cells on a substrate; introducing cells to the substrate of the system; adding at least one test compound and IgE to the cells, wherein the at least one test compound is suspected of modulating cell responses stimulated by the IgE; adding an antigen to the cells; monitoring the cell-substrate impedance of cells on the substrate; and analyzing the cell-substrate impedance to evaluate whether the at least one test compound alters a cellular response to stimulation with the IgE.Type: ApplicationFiled: April 13, 2017Publication date: November 2, 2017Inventors: Xiao Xu, Yama A. Abassi, Xiaobo Wang, Jiangbo Gan
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Patent number: 9625472Abstract: The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays.Type: GrantFiled: September 23, 2011Date of Patent: April 18, 2017Assignee: ACEA Biosciences, Inc.Inventors: Xiao Xu, Yama Abassi, Xiaobo Wang, Jiangbo Gan
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Publication number: 20120142031Abstract: The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays.Type: ApplicationFiled: September 23, 2011Publication date: June 7, 2012Inventors: Xiao Xu, Yama Abassi, Xiaobo Wang, Jiangbo Gan
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Patent number: 8068797Abstract: A gain control process (1102) executed at a transmitter (500) generates (1314) a gain ramp signal (1206) having a delay component (1224) and a gain component (1226). The process (1102) further generates (1304) and incorporates (1306) a gain arc (1202) into a digital signal to form a digital gain signal (1204) having a digital gain change (1218). A combiner (502) combines a digital input signal (512) with the digital gain signal (1204) to generate a pre-compensated digital signal (516). A variable gain amplifier (508) applies a sequence of gains (1234,1236,1238,1240,1242) in the gain component (1126) of the gain ramp signal (1206) to a pre-adjusted analog signal (520) in order to generate a gain-adjusted analog signal (524). Application of the gain component (1126) and the digital gain change (1218) occurs when a portion (1212) of the gain arc (1202) indicates a low instantaneous signal power at an antenna (106) in order to reduce ACLR degradation.Type: GrantFiled: October 10, 2008Date of Patent: November 29, 2011Assignee: Freescale Semiconductor, Inc.Inventors: Jiangbo Gan, Srinivasa R. Bommareddy, Pravin Premakanthan
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Patent number: 8026080Abstract: The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cell-substrate monitoring systems comprising one or more cell-substrate monitoring devices comprising multiple wells each having an electrode array, an impedance analyzer, a device station that connects arrays of individual wells to the impedance analyzer, and software for controlling the device station and impedance analyzer. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays.Type: GrantFiled: March 15, 2007Date of Patent: September 27, 2011Assignee: Acea Biosciences, Inc.Inventors: Xiaobo Wang, Yama A. Abassi, Xiao Xu, Jiangbo Gan
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Publication number: 20090088102Abstract: A gain control process (1102) executed at a transmitter (500) generates (1314) a gain ramp signal (1206) having a delay component (1224) and a gain component (1226). The process (1102) further generates (1304) and incorporates (1306) a gain arc (1202) into a digital signal to form a digital gain signal (1204) having a digital gain change (1218). A combiner (502) combines a digital input signal (512) with the digital gain signal (1204) to generate a pre-compensated digital signal (516). A variable gain amplifier (508) applies a sequence of gains (1234,1236,1238,1240,1242) in the gain component (1126) of the gain ramp signal (1206) to a pre-adjusted analog signal (520) in order to generate a gain-adjusted analog signal (524). Application of the gain component (1126) and the digital gain change (1218) occurs when a portion (1212) of the gain arc (1202) indicates a low instantaneous signal power at an antenna (106) in order to reduce ACLR degradation.Type: ApplicationFiled: October 10, 2008Publication date: April 2, 2009Applicant: FREESCALE SEMICONDUCTOR, INC.Inventors: Jiangbo Gan, Srinivasa R. Bommareddy, Pravin Premakanthan
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Patent number: 7443323Abstract: Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.Type: GrantFiled: January 10, 2007Date of Patent: October 28, 2008Assignee: Freescale Semiconductor, Inc.Inventors: Christian J. Rotchford, Brandt Braswell, Jiangbo Gan, Michael L. Gomez, Gerald P. Miaille, Boris V. Razmyslovitch
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Publication number: 20080165040Abstract: Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.Type: ApplicationFiled: January 10, 2007Publication date: July 10, 2008Inventors: Christian J. Rotchford, Brandt Braswell, Jiangbo Gan, Michael L. Gomez, Gerald P. Miaille, Boris V. Razmyslovitch
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Publication number: 20070172939Abstract: The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cell-substrate monitoring systems comprising one or more cell-substrate monitoring devices comprising multiple wells each having an electrode array, an impedance analyzer, a device station that connects arrays of individual wells to the impedance analyzer, and software for controlling the device station and impedance analyzer. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays.Type: ApplicationFiled: March 15, 2007Publication date: July 26, 2007Inventors: Xiao Xu, Yama Abassi, Xiaobo Wang, Jiangbo Gan
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Patent number: 7192752Abstract: The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cell-substrate monitoring systems comprising one or more cell-substrate monitoring devices comprising multiple wells each having an electrode array, an impedance analyzer, a device station that connects arrays of individual wells to the impedance analyzer, and software for controlling the device station and impedance analyzer. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays.Type: GrantFiled: November 12, 2004Date of Patent: March 20, 2007Assignee: ACEA BioSciencesInventors: Xiao Xu, Yama Abassi, Xiaobo Wang, Jiangbo Gan
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Publication number: 20050153425Abstract: The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cell-substrate monitoring systems comprising one or more cell-substrate monitoring devices comprising multiple wells each having an electrode array, an impedance analyzer, a device station that connects arrays of individual wells to the impedance analyzer, and software for controlling the device station and impedance analyzer. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays.Type: ApplicationFiled: November 12, 2004Publication date: July 14, 2005Inventors: Xiao Xu, Yama Abassi, Xiaobo Wang, Jiangbo Gan