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).

  • Patent number: 8440369
    Abstract: 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: Grant
    Filed: July 17, 2012
    Date of Patent: May 14, 2013
    Assignee: Nanosys, Inc.
    Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 8357475
    Abstract: 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: Grant
    Filed: May 31, 2011
    Date of Patent: January 22, 2013
    Assignee: Nanosys, Inc.
    Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Publication number: 20120282540
    Abstract: 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: Application
    Filed: July 17, 2012
    Publication date: November 8, 2012
    Applicant: NANOSYS, INC.
    Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Publication number: 20110229795
    Abstract: 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: Application
    Filed: May 31, 2011
    Publication date: September 22, 2011
    Applicant: NANOSYS, INC.
    Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 7977007
    Abstract: 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: Grant
    Filed: September 19, 2008
    Date of Patent: July 12, 2011
    Assignee: Nanosys, Inc.
    Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 7977013
    Abstract: 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: Grant
    Filed: December 20, 2006
    Date of Patent: July 12, 2011
    Assignee: Nanosys, Inc.
    Inventors: Chunming Niu, Calvin Y. H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 7910064
    Abstract: 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: Grant
    Filed: April 6, 2006
    Date of Patent: March 22, 2011
    Assignee: Nanosys, Inc.
    Inventors: James M. Hamilton, Robert S. Dubrow, Calvin Y. H. Chow
  • Publication number: 20100233585
    Abstract: 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: Application
    Filed: December 20, 2006
    Publication date: September 16, 2010
    Applicant: Nanosys, Inc.
    Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 7795125
    Abstract: 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: Grant
    Filed: November 20, 2008
    Date of Patent: September 14, 2010
    Assignee: 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
  • Patent number: 7758737
    Abstract: 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: Grant
    Filed: July 31, 2007
    Date of Patent: July 20, 2010
    Assignee: Caliper Life Sciences, Inc.
    Inventor: Calvin Y. H. Chow
  • Patent number: 7750235
    Abstract: 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: Grant
    Filed: August 4, 2006
    Date of Patent: July 6, 2010
    Assignee: Nanosys, Inc.
    Inventors: Erik C. Scher, Mihai Buretea, Calvin Y. H. Chow, Stephen A. Empedocles, Andreas P. Meisel, J. Wallace Parce
  • Publication number: 20100001982
    Abstract: 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: Application
    Filed: June 11, 2009
    Publication date: January 7, 2010
    Applicant: NANOSYS, INC.
    Inventors: J. Wallace Parce, Calvin Y.H. Chow, Andreas P. Meisel, Linh Nguyen, Erik C. Scher, Jeffery A. Whiteford
  • Patent number: 7595528
    Abstract: 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: Grant
    Filed: December 21, 2004
    Date of Patent: September 29, 2009
    Assignee: Nanosys, Inc.
    Inventors: Xiangfeng Duan, Calvin Y. H. Chow, David L. Heald, Chunming Niu, J. Wallace Parce, David P. Stumbo
  • Publication number: 20090124025
    Abstract: 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: Application
    Filed: April 6, 2006
    Publication date: May 14, 2009
    Applicant: Nanosys, Inc.
    Inventors: James M. Hamilton, Robert S. Dubrow, Calvin Y.H. Chow
  • Publication number: 20090017363
    Abstract: 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: Application
    Filed: September 19, 2008
    Publication date: January 15, 2009
    Applicant: NANOSYS, INC.
    Inventors: Chunming Niu, Calvin Y.H. Chow, Stephen A. Empedocles, J. Wallace Parce
  • Patent number: 7468315
    Abstract: 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: Grant
    Filed: September 14, 2005
    Date of Patent: December 23, 2008
    Assignee: 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
  • Patent number: 7466533
    Abstract: 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: Grant
    Filed: August 17, 2007
    Date of Patent: December 16, 2008
    Assignee: Nanosys, Inc
    Inventors: Calvin Y.H. Chow, Robert S. Dubrow
  • Publication number: 20080257406
    Abstract: 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: Application
    Filed: June 4, 2008
    Publication date: October 23, 2008
    Applicant: Nanosys, Inc.
    Inventors: J. Wallace Parce, Calvin Y.H. Chow, Andreas P. Meisel, Linh Nguyen, Erik C. Scher, Jeffery A. Whiteford
  • Publication number: 20080257407
    Abstract: 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: Application
    Filed: June 4, 2008
    Publication date: October 23, 2008
    Applicant: Nanosys, Inc.
    Inventors: J. Wallace Parce, Calvin Y.H. Chow, Andreas P. Meisel, Linh Nguyen, Erik C. Scher, Jeffery A. Whiteford
  • Patent number: RE43868
    Abstract: 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: Grant
    Filed: December 16, 2010
    Date of Patent: December 25, 2012
    Assignee: Nanosys, Inc.
    Inventors: Calvin Y. H. Chow, Robert Dubrow