Patents by Inventor Vijendra Sahi
Vijendra Sahi 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: 10490817Abstract: The present invention relates to nanostructured materials (including nanowires) for use in batteries. Exemplary materials include carbon-comprising, Si-based nanostructures, nanostructured materials disposed on carbon-based substrates, and nanostructures comprising nanoscale scaffolds. The present invention also provides methods of preparing battery electrodes, and batteries, using the nanostructured materials.Type: GrantFiled: May 19, 2010Date of Patent: November 26, 2019Assignee: OneD Material LLCInventors: Yimin Zhu, Jay L. Goldman, Jason Hartlove, Hans Jurgen Hofler, Baixin Qian, Vijendra Sahi, Ionel C. Stefan, David P. Stumbo
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Patent number: 8956637Abstract: This invention provides novel nanofiber enhanced surface area substrates and structures comprising such substrates for use in various medical devices, as well as methods and uses for such substrates and medical devices. In one particular embodiment, methods for enhancing cellular functions on a surface of a medical device implant are disclosed which generally comprise providing a medical device implant comprising a plurality of nanofibers (e.g., nanowires) thereon and exposing the medical device implant to cells such as osteoblasts.Type: GrantFiled: April 28, 2011Date of Patent: February 17, 2015Assignee: Nanosys, Inc.Inventors: Robert S. Dubrow, Lawrence A. Bock, R. Hugh Daniels, Veeral D. Hardev, Chunming Niu, Vijendra Sahi
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Patent number: 8304595Abstract: Methods, systems, and apparatuses for nanomaterial-enhanced hemostatic medical devices are provided. Hemostatic materials and structures are provided that induce coagulation of blood at a wound/opening caused by trauma, a surgical procedure, ulceration, or other cause. The hemostatic materials and structures may incorporate nanostructures and/or further hemostatic elements such as polymers and/or glass beads. The hemostatic materials and structures may be resorbable. Example embodiments include hemostatic bandages, hemostatic plugs, and hemostatic formulations.Type: GrantFiled: December 5, 2008Date of Patent: November 6, 2012Assignee: Nanosys, Inc.Inventors: R. Hugh Daniels, Robert S. Dubrow, Robert Enzerink, Esther Li, Vijendra Sahi, Jay L. Goldman, J. Wallace Parce
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Publication number: 20110201984Abstract: This invention provides novel nanofiber enhanced surface area substrates and structures comprising such substrates for use in various medical devices, as well as methods and uses for such substrates and medical devices. In one particular embodiment, methods for enhancing cellular functions on a surface of a medical device implant are disclosed which generally comprise providing a medical device implant comprising a plurality of nanofibers (e.g., nanowires) thereon and exposing the medical device implant to cells such as osteoblasts.Type: ApplicationFiled: April 28, 2011Publication date: August 18, 2011Applicant: NANOSYS, INC.Inventors: Robert S. Dubrow, Lawrence A. Bock, R. Hugh Daniels, Veeral D. Hardev, Chunming Niu, Vijendra Sahi
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Patent number: 7985454Abstract: The present invention is directed to compositions of matter, systems, and methods to manufacture nanowires. In an embodiment, a method to produce a catalytic-coated nanowire growth substrate for nanowire growth is disclosed which comprises: (a) depositing a buffer layer on a substrate; (b) treating the buffer layer with boiled water or steam to enhance interactions between the buffer layer and catalyst particles; and (c) depositing catalytic particles on a surface of the buffer layer. Methods to develop and use this catalytic-coated nanowire growth substrate are disclosed.Type: GrantFiled: September 23, 2008Date of Patent: July 26, 2011Assignee: Nanosys, Inc.Inventors: Chunming Niu, Jay L. Goldman, Xiangfeng Duan, Vijendra Sahi
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Patent number: 7972616Abstract: This invention provides novel nanofiber enhanced surface area substrates and structures comprising such substrates for use in various medical devices, as well as methods and uses for such substrates and medical devices. In one particular embodiment, methods for enhancing cellular functions on a surface of a medical device implant are disclosed which generally comprise providing a medical device implant comprising a plurality of nanofibers (e.g., nanowires) thereon and exposing the medical device implant to cells such as osteoblasts.Type: GrantFiled: January 12, 2006Date of Patent: July 5, 2011Assignee: Nanosys, Inc.Inventors: Robert S. Dubrow, Lawrence A. Bock, R. Hugh Daniels, Veeral D. Hardev, Chunming Niu, Vijendra Sahi
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Patent number: 7951422Abstract: The present invention is directed to systems and methods for nanowire growth and harvesting. In an embodiment, methods for nanowire growth and doping are provided, including methods for epitaxial oriented nanowire growth using a combination of silicon precursors, as well as us of patterned substrates to grow oriented nanowires. In a further aspect of the invention, methods to improve nanowire quality through the use of sacrifical growth layers are provided. In another aspect of the invention, methods for transferring nanowires from one substrate to another substrate are provided.Type: GrantFiled: December 20, 2006Date of Patent: May 31, 2011Assignee: Nanosys, Inc.Inventors: Yaoling Pan, Xiangfeng Duan, Robert S. Dubrow, Jay Goldman, Shahriar Mostarshed, Chunming Niu, Linda T. Romano, David P. Stumbo, Alice Fischer-Colbrie, Vijendra Sahi, Virginia Robbins
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Patent number: 7932511Abstract: A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.Type: GrantFiled: March 1, 2007Date of Patent: April 26, 2011Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, Chunming Niu, Stephen Empedocles, Linda T. Romano, Jian Chen, Vijendra Sahi, Lawrence Bock, David Stumbo, J. Wallace Parce, Jay L. Goldman
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Patent number: 7851841Abstract: A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.Type: GrantFiled: June 8, 2007Date of Patent: December 14, 2010Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, Chunming Niu, Stephen A. Empedocles, Linda T. Romano, Jian Chen, Vijendra Sahi, Lawrence Bock, David P. Stumbo, J. Wallace Parce, Jay L. Goldman
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Publication number: 20100297502Abstract: The present invention relates to nanostructured materials (including nanowires) for use in batteries. Exemplary materials include carbon-comprising, Si-based nanostructures, nanostructured materials disposed on carbon-based substrates, and nanostructures comprising nanoscale scaffolds. The present invention also provides methods of preparing battery electrodes, and batteries, using the nanostructured materials.Type: ApplicationFiled: May 19, 2010Publication date: November 25, 2010Applicant: NANOSYS, Inc.Inventors: Yimin ZHU, Jay L. GOLDMAN, Jason HARTLOVE, Hans Jurgen HOFLER, Baixin QIAN, Vijendra SAHI, Ionel C. STEFAN, David P. STUMBO
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Publication number: 20100285972Abstract: This invention provides novel nanofiber enhanced surface area substrates and structures comprising such substrates, as well as methods and uses for such substrates.Type: ApplicationFiled: October 17, 2007Publication date: November 11, 2010Applicant: Nanosys, Inc.Inventors: Roberto Dubrow, Robert Hugh Daniels, J. Wallace Parce, Matthew Murphy, Jim Hamilton, Erik Scher, Dave Stumbo, Chunming Niu, Linda T. Romano, Jay Goldman, Vijendra Sahi, Jeffery A. Whiteford
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Publication number: 20100279513Abstract: The present invention is directed to compositions of matter, systems, and methods to manufacture nanowires. In an embodiment, a buffer layer is placed on a nanowire growth substrate and catalytic nanoparticles are added to form a catalytic-coated nanowire growth substrate. Methods to develop and use this catalytic-coated nanowire growth substrate are disclosed. In a further aspect of the invention, in an embodiment a nanowire growth system using a foil roller to manufacture nanowires is provided.Type: ApplicationFiled: September 23, 2008Publication date: November 4, 2010Applicant: NANOSYS, INC.Inventors: Chunming Niu, Jay L. Goldman, Xiangfeng Duan, Vijendra Sahi
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Patent number: 7803574Abstract: This invention provides novel nanofiber enhanced surface area substrates and structures comprising such substrates for use in various medical devices, as well as methods and uses for such substrates and medical devices. In one particular embodiment, a method of administering a composition to a patient is disclosed which comprises providing a composition-eluting device, said composition-eluting device comprising at least a first surface and a plurality of nanostructures attached to the first surface, and introducing the composition-eluting device into the body of the patient.Type: GrantFiled: February 22, 2007Date of Patent: September 28, 2010Assignee: Nanosys, Inc.Inventors: Tejal Desai, R. Hugh Daniels, Vijendra Sahi
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Publication number: 20100167512Abstract: Methods of doping nanostructures, such as nanowires, are disclosed. The methods provide a variety of approaches for improving existing methods of doping nanostructures. The embodiments include the use of a sacrificial layer to promote uniform dopant distribution within a nanostructure during post-nanostructure synthesis doping. In another embodiment, a high temperature environment is used to anneal nanostructure damage when high energy ion implantation is used. In another embodiment rapid thermal annealing is used to drive dopants from a dopant layer on a nanostructure into the nanostructure. In another embodiment a method for doping nanowires on a plastic substrate is provided that includes depositing a dielectric stack on a plastic substrate to protect the plastic substrate from damage during the doping process.Type: ApplicationFiled: March 9, 2010Publication date: July 1, 2010Applicant: NANOSYS, INC.Inventors: Yaoling Pan, Jian Chen, Francisco Leon, Shahriar Mostarshed, Linda T. Romano, Vijendra Sahi, David P. Stumbo
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Publication number: 20100155696Abstract: A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.Type: ApplicationFiled: March 1, 2007Publication date: June 24, 2010Applicant: NANOSYS, INC.Inventors: Xiangfeng Duan, Chunming Niu, Stephen Empedocles, Linda T. Romano, Jian Chen, Vijendra Sahi, Lawrence Bock, David Stumbo, J. Wallace Parce, Jay L. Goldman
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Patent number: 7651944Abstract: Methods of positioning and orienting nanostructures, and particularly nanowires, on surfaces for subsequent use or integration. The methods utilize mask based processes alone or in combination with flow based alignment of the nanostructures to provide oriented and positioned nanostructures on surfaces. Also provided are populations of positioned and/or oriented nanostructures, devices that include populations of positioned and/or oriented nanostructures, systems for positioning and/or orienting nanostructures, and related devices, systems and methods.Type: GrantFiled: August 5, 2008Date of Patent: January 26, 2010Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, R. Hugh Daniels, Chunming Niu, Vijendra Sahi, James M. Hamilton, Linda T. Romano
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Publication number: 20090192429Abstract: Methods, systems, and apparatuses for nanomaterial-enhanced hemostatic medical devices are provided. Hemostatic materials and structures are provided that induce coagulation of blood at a wound/opening caused by trauma, a surgical procedure, ulceration, or other cause. The hemostatic materials and structures may incorporate nanostructures and/or further hemostatic elements such as polymers and/or glass beads. The hemostatic materials and structures may be resorbable. Example embodiments include hemostatic bandages, hemostatic plugs, and hemostatic formulations.Type: ApplicationFiled: December 5, 2008Publication date: July 30, 2009Applicant: NANOSYS, INC.Inventors: R. Hugh Daniels, Robert S. Dubrow, Robert Enzerink, Esther Li, Vijendra Sahi, Jay L. Goldman, J. Wallace Parce
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Publication number: 20080293244Abstract: Methods of positioning and orienting nanostructures, and particularly nanowires, on surfaces for subsequent use or integration. The methods utilize mask based processes alone or in combination with flow based alignment of the nanostructures to provide oriented and positioned nanostructures on surfaces. Also provided are populations of positioned and/or oriented nanostructures, devices that include populations of positioned and/or oriented nanostructures, systems for positioning and/or orienting nanostructures, and related devices, systems and methods.Type: ApplicationFiled: August 5, 2008Publication date: November 27, 2008Applicant: NANOSYS, INC.Inventors: Xiangfeng Duan, Hugh Daniels, Chunming Niu, Vijendra Sahi, James Hamilton, Linda T. Romano
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Patent number: 7427328Abstract: A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.Type: GrantFiled: November 21, 2006Date of Patent: September 23, 2008Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, Chunming Niu, Stephen A. Empedocles, Linda T. Romano, Jian Chen, Vijendra Sahi, Lawrence A. Bock, David P. Stumbo, J. Wallace Parce, Jay L. Goldman
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Patent number: 7422980Abstract: Methods of positioning and orienting nanostructures, and particularly nanowires, on surfaces for subsequent use or integration. The methods utilize mask based processes alone or in combination with flow based alignment of the nanostructures to provide oriented and positioned nanostructures on surfaces. Also provided are populations of positioned and/or oriented nanostructures, devices that include populations of positioned and/or oriented nanostructures, systems for positioning and/or orienting nanostructures, and related devices, systems and methods.Type: GrantFiled: November 21, 2006Date of Patent: September 9, 2008Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, R. Hugh Daniels, Chunming Niu, Vijendra Sahi, James M. Hamilton, Linda T. Romano