Patents by Inventor Clarence Lew
Clarence Lew 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: 12210027Abstract: The present teachings relate to methods, systems, and kits for the preparation, purification and/or analysis of a glycan or glycoconjugate, and specifically to a magnetic bead based sample preparation protocol. In some aspects, the sample preparation protocol can provide for glycoconjugate capture, glycan release, fluorescent derivatization, and glycan purification for subsequent capillary electrophoresis, liquid chromatography, or other glycoanalytical method using magnetic beads containing negatively charged carboxyl groups extending from the surface of the magnetic beads.Type: GrantFiled: February 14, 2022Date of Patent: January 28, 2025Assignee: Beckman Coulter, Inc.Inventors: Andras Guttman, Clarence Lew, Marton Szigeti, Csaba Varadi
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Publication number: 20220163549Abstract: The present teachings relate to methods, systems, and kits for the preparation, purification and/or analysis of a glycan or glycoconjugate, and specifically to a magnetic bead based sample preparation protocol. In some aspects, the sample preparation protocol can provide for glycoconjugate capture, glycan release, fluorescent derivatization, and glycan purification for subsequent capillary electrophoresis, liquid chromatography, or other glycoanalytical method using magnetic beads containing negatively charged carboxyl groups extending from the surface of the magnetic beads.Type: ApplicationFiled: February 14, 2022Publication date: May 26, 2022Inventors: Andras Guttman, Clarence Lew, Marton Szigeti, Csaba Varadi
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Patent number: 11249098Abstract: The present teachings relate to methods, systems, and kits for the preparation, purification and/or analysis of a glycan or glycoconjugate, and specifically to a magnetic bead based sample preparation protocol. In some aspects, the sample preparation protocol can provide for glycoconjugate capture, glycan release, fluorescent derivatization, and glycan purification for subsequent capillary electrophoresis, liquid chromatography, or other glycoanalytical method using magnetic beads containing negatively charged carboxyl groups extending from the surface of the magnetic beads.Type: GrantFiled: February 15, 2019Date of Patent: February 15, 2022Assignee: Beckman Coulter, Inc.Inventors: Andras Guttman, Clarence Lew, Marton Szigeti, Csaba Varadi
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Publication number: 20190227086Abstract: The present teachings relate to methods, systems, and kits for the preparation, purification and/or analysis of a glycan or glycoconjugate, and specifically to a magnetic bead based sample preparation protocol that can enable full automation and reduced sample preparation time relative to current methods of glycoanalysis. In some aspects, the sample preparation protocol can provide for glycoconjugate capture, glycan release, fluorescent derivatization, and glycan purification for subsequent capillary electrophoresis, liquid chromatography, or other glycoanalytical method without requiring time-consuming sample preparation steps such as centrifugation or vacuum-centrifugation.Type: ApplicationFiled: February 15, 2019Publication date: July 25, 2019Inventors: Andras Guttman, Clarence Lew, Marton Szigeti, Csaba Varadi
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Patent number: 10247745Abstract: The present teachings relate to methods, systems, and kits for the preparation, purification and/or analysis of a glycan or glycoconjugate, and specifically to a magnetic bead based sample preparation protocol that can enable full automation and reduced sample preparation time relative to current methods of glycoanalysis. In some aspects, the sample preparation protocol can provide for glycoconjugate capture, glycan release, fluorescent derivatization, and glycan purification for subsequent capillary electrophoresis, liquid chromatography, or other glycoanalytical method without requiring time-consuming sample preparation steps such as centrifugation or vacuum-centrifugation.Type: GrantFiled: April 27, 2015Date of Patent: April 2, 2019Assignee: Beckman Coulter, Inc.Inventors: Andras Guttman, Clarence Lew, Marton Szigeti, Csaba Varadi
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Publication number: 20170335137Abstract: Embodiments described herein are directed to, among other things, compositions and methods for coating surfaces, including, but not limited to, coating a surface with a hydrophobic coating using alkoxysilanes. Coated surfaces are also provided.Type: ApplicationFiled: October 28, 2015Publication date: November 23, 2017Inventors: Clarence Lew, Chitra K. Ratnayake
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Publication number: 20170045538Abstract: The present teachings relate to methods, systems, and kits for the preparation, purification and/or analysis of a glycan or glycoconjugate, and specifically to a magnetic bead based sample preparation protocol that can enable full automation and reduced sample preparation time relative to current methods of glycoanalysis. In some aspects, the sample preparation protocol can provide for glycoconjugate capture, glycan release, fluorescent derivatization, and glycan purification for subsequent capillary electrophoresis, liquid chromatography, or other glycoanalytical method without requiring time-consuming sample preparation steps such as centrifugation or vacuum-centrifugation.Type: ApplicationFiled: April 27, 2015Publication date: February 16, 2017Inventors: Andras Guttman, Clarence Lew, Marton Szigeti, Csaba Varadi
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Patent number: 7440101Abstract: A system for measuring the irradiance of a fluorescently labeled particle having a cytometric flow chamber; a plurality of excitation light sources; a plurality of scatter detectors, each configured to detect light from only one of the plurality of excitation light sources and arranged so as to detect scattered light from the particle; a trigger connected to the plurality of scatter detectors, the trigger emitting a signal when scattered light incident on one of the scatter detectors is exceeding a predetermined threshold value; collection optics; at least one fluorescence detector to receive emissions collected by the collection optics and generate an output, the at least one fluorescence detector being configured to respond only to a discrete number of wavelength bands; and an integrator for recording the output of the at least one fluorescence detector in response to a signal from the trigger.Type: GrantFiled: January 23, 2004Date of Patent: October 21, 2008Assignee: Beckman Coulter, Inc.Inventors: Robert Edward Auer, Clarence Lew, Stephen Lyle Pentoney, David Lin Yang
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Publication number: 20070238140Abstract: A method for detecting a target analyte in a sample, the method having the steps of: binding the target analyte to a fluorescently coded particle capable of specifically binding to the target analyte; labeling the target analyte with a first chemiluminescence component; adding a second chemiluminescence component to the labeled target analyte to produce chemiluminescence; stabilizing the particle; exciting fluorescence from the fluorescently coded particle; detecting fluorescence from the fluorescently coded particle; and detecting the chemiluminescence.Type: ApplicationFiled: April 7, 2006Publication date: October 11, 2007Inventors: Stephen Pentoney, David Yang, Clarence Lew
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Patent number: 7179357Abstract: The invention is a method of performing electrophoresis that increases sample throughput and increases the efficiency and speed of the analysis of polynucleotides by electrophoresis. The method is performed by loading and running multiple sequential samples on each capillary gel without flushing or replacing the gel between samples.Type: GrantFiled: October 25, 2002Date of Patent: February 20, 2007Assignee: Beckman Coulter, Inc.Inventors: Clarence Lew, Stephen L. Pentoney, Jr., David L. Yang
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Publication number: 20050162648Abstract: A system for measuring the irradiance of a fluorescently labeled particle having a cytometric flow chamber; a plurality of excitation light sources; a plurality of scatter detectors, each configured to detect light from only one of the plurality of excitation light sources and arranged so as to detect scattered light from the particle; a trigger connected to the plurality of scatter detectors, the trigger emitting a signal when scattered light incident on one of the scatter detectors is exceeding a predetermined threshold value; collection optics; at least one fluorescence detector to receive emissions collected by the collection optics and generate an output, the at least one fluorescence detector being configured to respond only to a discrete number of wavelength bands; and an integrator for recording the output of the at least one fluorescence detector in response to a signal from the trigger.Type: ApplicationFiled: January 23, 2004Publication date: July 28, 2005Inventors: Robert Auer, Clarence Lew, Stephen Pentoney, David Yang
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Publication number: 20040079640Abstract: The invention is a method of performing electrophoresis that increases sample throughput and increases the efficiency and speed of the analysis of polynucleotides by electrophoresis. The method is performed by loading and running multiple sequential samples on each capillary gel without flushing or replacing the gel between samples.Type: ApplicationFiled: October 25, 2002Publication date: April 29, 2004Inventors: Clarence Lew, Stephen L. Pentoney, David L. Yang