Patents by Inventor Calvin Y. H. Chow
Calvin Y. H. Chow 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: 8440369Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: GrantFiled: July 17, 2012Date of Patent: May 14, 2013Assignee: Nanosys, Inc.Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Patent number: 8357475Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: GrantFiled: May 31, 2011Date of Patent: January 22, 2013Assignee: Nanosys, Inc.Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Publication number: 20120282540Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: ApplicationFiled: July 17, 2012Publication date: November 8, 2012Applicant: NANOSYS, INC.Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Publication number: 20110229795Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: ApplicationFiled: May 31, 2011Publication date: September 22, 2011Applicant: NANOSYS, INC.Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Patent number: 7977007Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: GrantFiled: September 19, 2008Date of Patent: July 12, 2011Assignee: Nanosys, Inc.Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Patent number: 7977013Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: GrantFiled: December 20, 2006Date of Patent: July 12, 2011Assignee: Nanosys, Inc.Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Patent number: 7910064Abstract: This invention provides nanowire based molecular sensors and methods for detecting analytes in a microfluidic system. Methods for sensing analytes include detecting changed electrical parameters associated with contact of a nanowire with the analyte in a microfluidic system. Sensors of the invention include nanowires mounted in microchambers of a microfluidic system in electrical contact with the detector, whereby electrical parameter changes induced in the nanowire by the analyte can be monitored by the detector.Type: GrantFiled: April 6, 2006Date of Patent: March 22, 2011Assignee: Nanosys, Inc.Inventors: James M. Hamilton, Robert S. Dubrow, Calvin Y. H. Chow
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Publication number: 20100233585Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: ApplicationFiled: December 20, 2006Publication date: September 16, 2010Applicant: Nanosys, Inc.Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Patent number: 7795125Abstract: The present invention relates to a system and process for producing a nanowire-material composite. A substrate having nanowires attached to a portion of at least one surface is provided. A material is deposited over the portion to form the nanowire-material composite. The process further optionally includes separating the nanowire-material composite from the substrate to form a freestanding nanowire-material composite. The freestanding nanowire material composite is optionally further processed into a electronic substrate. A variety of electronic substrates can be produced using the methods described herein. For example, a multi-color light-emitting diode can be produced from multiple, stacked layers of nanowire-material composites, each composite layer emitting light at a different wavelength.Type: GrantFiled: November 20, 2008Date of Patent: September 14, 2010Assignee: Nanosys, Inc.Inventors: Mihai A. Buretea, Jian Chen, Calvin Y. H. Chow, Chunming Niu, Yaoling Pan, J. Wallace Parce, Linda T. Romano, David P. Stumbo
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Patent number: 7758737Abstract: Methods for determining total analyte concentrations and amounts, especially in combination with analyte separations are provided. Microfluidic devices are used to separate analyte mixtures and detect the individual analytes. Signal areas are summed for each individual analyte to quantitate the total analyte amount. Separate measurements of the total analyte sample are also used to determine total analyte concentration.Type: GrantFiled: July 31, 2007Date of Patent: July 20, 2010Assignee: Caliper Life Sciences, Inc.Inventor: Calvin Y. H. Chow
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Patent number: 7750235Abstract: Nanocomposite photovoltaic devices are provided that generally include semiconductor nanocrystals as at least a portion of a photoactive layer. Photovoltaic devices and other layered devices that comprise core-shell nanostructures and/or two populations of nanostructures, where the nanostructures are not necessarily part of a nanocomposite, are also features of the invention. Varied architectures for such devices are also provided including flexible and rigid architectures, planar and non-planar architectures and the like, as are systems incorporating such devices, and methods and systems for fabricating such devices. Compositions comprising two populations of nanostructures of different materials are also a feature of the invention.Type: GrantFiled: August 4, 2006Date of Patent: July 6, 2010Assignee: Nanosys, Inc.Inventors: Erik C. Scher, Mihai Buretea, Calvin Y. H. Chow, Stephen A. Empedocles, Andreas P. Meisel, J. Wallace Parce
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Publication number: 20100001982Abstract: Devices, compositions and methods for producing photoactive devices, systems and compositions that have improved conversion efficiencies relative to previously described devices, systems and compositions. This improved efficiency is generally obtained by one or both of improving the efficiency of light absorption into the photoactive component, and improving the efficiency of energy extraction from that active component.Type: ApplicationFiled: June 11, 2009Publication date: January 7, 2010Applicant: NANOSYS, INC.Inventors: J. Wallace Parce, Calvin Y.H. Chow, Andreas P. Meisel, Linh Nguyen, Erik C. Scher, Jeffery A. Whiteford
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Patent number: 7595528Abstract: Methods and apparatuses for nanoenabled memory devices and anisotropic charge carrying arrays are described. In an aspect, a memory device includes a substrate, a source region of the substrate, and a drain region of the substrate. A population of nanoelements is deposited on the substrate above a channel region, the population of nanolements in one embodiment including metal quantum dots. A tunnel dielectric layer is formed on the substrate overlying the channel region, and a metal migration barrier layer is deposited over the dielectric layer. A gate contact is formed over the thin film of nanoelements. The nanoelements allow for reduced lateral charge transfer. The memory device may be a single or multistate memory device.Type: GrantFiled: December 21, 2004Date of Patent: September 29, 2009Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, Calvin Y. H. Chow, David L. Heald, Chunming Niu, J. Wallace Parce, David P. Stumbo
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Publication number: 20090124025Abstract: This invention provides nanowire based molecular sensors and methods for detecting analytes in a microfluidic system. Methods for sensing analytes include detecting changed electrical parameters associated with contact of a nanowire with the analyte in a microfluidic system. Sensors of the invention include nanowires mounted in microchambers of a microfluidic system in electrical contact with the detector, whereby electrical parameter changes induced in the nanowire by the analyte can be monitored by the detector.Type: ApplicationFiled: April 6, 2006Publication date: May 14, 2009Applicant: Nanosys, Inc.Inventors: James M. Hamilton, Robert S. Dubrow, Calvin Y.H. Chow
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Publication number: 20090017363Abstract: The present invention discloses nanowires for use in a fuel cell comprising a metal catalyst deposited on a surface of the nanowires. A membrane electrode assembly for a fuel cell is disclosed which generally comprises a proton exchange membrane, an anode electrode, and a cathode electrode, wherein at least one or more of the anode electrode and cathode electrode comprise an interconnected network of the catalyst supported nanowires. Methods are also disclosed for preparing a membrane electrode assembly and fuel cell based upon an interconnected network of nanowires.Type: ApplicationFiled: September 19, 2008Publication date: January 15, 2009Applicant: NANOSYS, INC.Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
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Patent number: 7468315Abstract: The present invention relates to a system and process for producing a nanowire-material composite. A substrate having nanowires attached to a portion of at least one surface is provided. A material is deposited over the portion to form the nanowire-material composite. The process further optionally includes separating the nanowire-material composite from the substrate to form a freestanding nanowire-material composite. The freestanding nanowire material composite is optionally further processed into an electronic substrate. A variety of electronic substrates can be produced using the methods described herein. For example, a multi-color light-emitting diode can be produced from multiple, stacked layers of nanowire-material composites, each composite layer emitting light at a different wavelength.Type: GrantFiled: September 14, 2005Date of Patent: December 23, 2008Assignee: Nanosys, Inc.Inventors: Mihai A. Buretea, Jian Chen, Calvin Y. H. Chow, Chunming Niu, Yaoling Pan, J. Wallace Parce, Linda T. Romano, David P. Stumbo
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Patent number: 7466533Abstract: This invention provides novel capacitors comprising nanofiber enhanced surface area substrates and structures comprising such capacitors, as well as methods and uses for such capacitors.Type: GrantFiled: August 17, 2007Date of Patent: December 16, 2008Assignee: Nanosys, IncInventors: Calvin Y.H. Chow, Robert S. Dubrow
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Publication number: 20080257406Abstract: Devices, compositions and methods for producing photoactive devices, systems and compositions that have improved conversion efficiencies relative to previously described devices, systems and compositions. This improved efficiency is generally obtained by one or both of improving the efficiency of light absorption into the photoactive component, and improving the efficiency of energy extraction from that active component.Type: ApplicationFiled: June 4, 2008Publication date: October 23, 2008Applicant: Nanosys, Inc.Inventors: J. Wallace Parce, Calvin Y.H. Chow, Andreas P. Meisel, Linh Nguyen, Erik C. Scher, Jeffery A. Whiteford
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Publication number: 20080257407Abstract: Devices, compositions and methods for producing photoactive devices, systems and compositions that have improved conversion efficiencies relative to previously described devices, systems and compositions. This improved efficiency is generally obtained by one or both of improving the efficiency of light absorption into the photoactive component, and improving the efficiency of energy extraction from that active component.Type: ApplicationFiled: June 4, 2008Publication date: October 23, 2008Applicant: Nanosys, Inc.Inventors: J. Wallace Parce, Calvin Y.H. Chow, Andreas P. Meisel, Linh Nguyen, Erik C. Scher, Jeffery A. Whiteford
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Patent number: RE43868Abstract: This invention provides navel capacitors comprising nanofiber enhanced surface area substrates and structures comprising such capacitors, as well as methods and uses for such capacitors.Type: GrantFiled: December 16, 2010Date of Patent: December 25, 2012Assignee: Nanosys, Inc.Inventors: Calvin Y. H. Chow, Robert Dubrow