Patents by Inventor Calvin Chow
Calvin 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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Publication number: 20060238764Abstract: Disclosed are photometric methods and devices for determining optical pathlength of liquid samples containing analytes dissolved or suspended in a solvent. The methods and devices rely on determining a relationship between the light absorption properties of the solvent and the optical pathlength of liquid samples containing the solvent. This relationship is used to establish the optical pathlength for samples containing an unknown concentration of analyte but having similar solvent composition. Further disclosed are methods and devices for determining the concentration of analyte in such samples where both the optical pathlength and the concentration of analyte are unknown. The methods and devices rely on separately determining, at different wavelengths of light, light absorption by the solvent and light absorption by the analyte. Light absorption by the analyte, together with the optical pathlength so determined, is used to calculate the concentration of the analyte.Type: ApplicationFiled: December 13, 2005Publication date: October 26, 2006Applicant: Molecular Devices CorporationInventors: Dean Hafeman, Calvin Chow
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Publication number: 20060188774Abstract: 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 6, 2005Publication date: August 24, 2006Applicant: Nanosys, Inc.Inventors: Chunming Niu, Calvin Chow, Stephen Empedocles, J. Parce
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Patent number: 7091120Abstract: 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: August 4, 2004Date of Patent: August 15, 2006Assignee: Nanosys, Inc.Inventors: Mihai Buretea, Jian Chen, Calvin Chow, Chunming Niu, Yaoling Pan, J. Wallace Parce, Linda T. Romano, David Stumbo
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Publication number: 20060121349Abstract: 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: ApplicationFiled: January 12, 2006Publication date: June 8, 2006Applicant: Nanosys, Inc.Inventors: Calvin Chow, Robert Dubrow
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Publication number: 20060112983Abstract: 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: November 10, 2005Publication date: June 1, 2006Applicant: Nanosys, Inc.Inventors: J. Parce, Calvin Chow, Andreas Meisel, Linh Nguyen, Erik Scher, Jeffery Whiteford
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Publication number: 20050279635Abstract: The present invention is generally directed to improved methods, structures and systems for interfacing microfluidic devices with ancillary systems that are used in conjunction with such devices. These systems typically include control and monitoring systems (620) for controlling the performance of the processes carried out within the device, e.g., monitoring and controlling environmental conditions and monitoring results of the processes performed, e.g., detection.Type: ApplicationFiled: December 6, 2004Publication date: December 22, 2005Applicant: Caliper Life Sciences, Inc.Inventors: Calvin Chow, J. Parce, Richard McReynolds, Colin Kennedy, Luc Bousse
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Patent number: 6962823Abstract: Nanostructure manufacturing methods and methods for assembling nanostructures into functional elements such as junctions, arrays and devices are provided. Systems for practicing the methods are also provided.Type: GrantFiled: April 1, 2003Date of Patent: November 8, 2005Assignee: Nanosys, Inc.Inventors: Stephen Empedocles, Larry Bock, Calvin Chow, Xianfeng Duan, Chungming Niu, George Pontis, Vijendra Sahi, Linda T. Romano, David Stumbo
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Publication number: 20050230356Abstract: Nanostructure manufacturing methods and methods for assembling nanostructures into functional elements such as junctions, arrays and devices are provided. Systems for practicing the methods are also provided.Type: ApplicationFiled: May 31, 2005Publication date: October 20, 2005Applicant: NANOSYS, Inc.Inventors: Stephen Empedocles, Larry Bock, Calvin Chow, Xianfeng Duan, Chunming Niu, George Pontis, Vijendra Sahi, Linda Romano, David Stumbo
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Publication number: 20050219788Abstract: 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: ApplicationFiled: March 8, 2005Publication date: October 6, 2005Applicant: Nanosys, Inc.Inventors: Calvin Chow, Robert Dubrow
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Publication number: 20050214967Abstract: 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: ApplicationFiled: December 9, 2004Publication date: September 29, 2005Applicant: Nanosys, Inc.Inventors: Eric Scher, Mihai Buretea, Calvin Chow, Stephen Empedocles, Andreas Meisel, J. Parce
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Publication number: 20050202615Abstract: 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 thin film of nanoelements is formed on the substrate above a channel region. A gate contact is formed on the thin film of nanoelements. The nanoelements allow for reduced lateral charge transfer. The memory device may be a single or multistate memory device. In a multistate memory device, nanoelements are present having a plurality of charge injection voltages, to provide multiple states. In another aspect, a printing device includes a charge diffusion layer that includes a matrix containing a plurality of nanoelements configured to be anisotropically electrically conductive through the charge diffusion layer to transfer charge to areas of the first surface with reduced lateral charge spread.Type: ApplicationFiled: March 10, 2004Publication date: September 15, 2005Applicant: Nanosys, Inc.Inventors: Xiangfeng Duan, Chunming Niu, David Stumbo, Calvin Chow
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Publication number: 20050201149Abstract: 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: ApplicationFiled: December 21, 2004Publication date: September 15, 2005Applicant: Nanosys, Inc.Inventors: Xiangfeng Duan, Calvin Chow, David Heald, Chunming Niu, J. Parce, David Stumbo
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Publication number: 20050150541Abstract: 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: ApplicationFiled: December 9, 2004Publication date: July 14, 2005Applicant: Nanosys, Inc.Inventors: Erik Scher, Mihai Buretea, Calvin Chow, Stephen Empedocles, Andreas Meisel, J. Parce
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Publication number: 20050126628Abstract: 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 provided, as are devices including a recombination material and/or multiple electrodes. 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 or nanostructures and a small molecule are also described, as are doped polymer nanocomposites. Compositions useful for making nanocomposites are also described.Type: ApplicationFiled: February 11, 2004Publication date: June 16, 2005Applicant: NANOSYS, Inc.Inventors: Erik Scher, Mihai Buretea, Calvin Chow, Stephen Empedocles, Andreas Meisel, J. Parce, Jeff Whiteford
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Patent number: 6878871Abstract: 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: September 4, 2003Date of Patent: April 12, 2005Assignee: Nanosys, Inc.Inventors: Erik Scher, Mihai A. Buretea, Calvin Chow, Stephen Empedocles, Andreas Meisel, J. Wallace Parce
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Publication number: 20050064185Abstract: 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 comprises 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: ApplicationFiled: August 4, 2004Publication date: March 24, 2005Inventors: Mihai Buretea, Jian Chen, Calvin Chow, Chunming Niu, Yaoling Pan, J. Parce, Linda Romano, David Stumbo
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Publication number: 20040136866Abstract: Sensor elements, and devices that incorporate those elements are provided, where the sensor comprises a thin semiconductor nanowire that is disposed upon, and integral to, an insulating substrate, where the nanowire is electrically coupled to a sensing surface that binds or otherwise interacts with an analyte of interest to yield a measurable effect on the nanowire element. The methods utilize extremely thin semiconductor on insulator substrates to provide nanowire dimensions for sensing elements that are fabricated using conventional semiconductor fabrication processes.Type: ApplicationFiled: June 26, 2003Publication date: July 15, 2004Applicant: NANOSYS, Inc.Inventors: George Pontis, Walter Stonas, Calvin Chow, J. Wallace Parce, Yaoling Pan, Linda T. Romano, Shahriar Mostarshed
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Publication number: 20040118448Abstract: 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: ApplicationFiled: September 4, 2003Publication date: June 24, 2004Applicant: NANOSYS, INC.Inventors: Erik Scher, Mihai A. Buretea, Calvin Chow, Stephen Empedocles, Andreas Meisel, J. Wallace Parce
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Publication number: 20040005723Abstract: Nanostructure manufacturing methods and methods for assembling nanostructures into functional elements such as junctions, arrays and devices are provided. Systems for practicing the methods are also provided.Type: ApplicationFiled: April 1, 2003Publication date: January 8, 2004Applicant: NANOSYS, Inc.Inventors: Stephen Empedocles, Larry Bock, Calvin Chow, Xianfeng Duan, Chungming Niu, George Pontis, Vijendra Sahi, Linda T. Romano, David Stumbo
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Patent number: 5529752Abstract: This invention encompasses a work station for conducting assays which comprises filtering assembly, a slide reading assembly, and a slide with a porous filter membrane wherein the slide has a means for aligning the slide within the filter assembly to filter reagents on predetermined portions of the porous filter membrane and also to position the slide in the slide reading assembly so that detection will occur in those same predetermined locations.Type: GrantFiled: December 22, 1994Date of Patent: June 25, 1996Assignee: Molecular Devices CorporationInventors: George Pontis, Michael Lacy, Vladimir Drbal, Calvin Chow, Thomas Smith, Rick Smethers, Debra A. Ross, Gregory Kirk, Jonathan Briggs, Lev Leytes, Suresh N. Mehta