Patents by Inventor William P. Freeman
William P. Freeman 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: 10266409Abstract: Methods for producing nanostructures, particularly Group III-V semiconductor nanostructures, are provided. The methods include use of novel Group III and/or Group V precursors, novel surfactants, oxide acceptors, high temperature, and/or stable co-products. Related compositions are also described. Methods and compositions for producing Group III inorganic compounds that can be used as precursors for nanostructure synthesis are provided. Methods for increasing the yield of nanostructures from a synthesis reaction by removal of a vaporous by-product are also described.Type: GrantFiled: October 25, 2017Date of Patent: April 23, 2019Assignee: Nanosys, Inc.Inventors: Erik C. Scher, Mihai A. Buretea, William P. Freeman, Joel Gamoras, Baixin Qian, Jeffrey A. Whiteford
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Publication number: 20180155623Abstract: Highly luminescent nanostructures, particularly highly luminescent quantum dots, are provided. The nanostructures have high photoluminescence quantum yields and in certain embodiments emit light at particular wavelengths and have a narrow size distribution. The nanostructures can comprise ligands, including C5-C8 carboxylic acid ligands employed during shell formation and/or dicarboxylic or polycarboxylic acid ligands provided after synthesis. Processes for producing such highly luminescent nanostructures are also provided, including methods for enriching nanostructure cores with indium and techniques for shell synthesis.Type: ApplicationFiled: December 22, 2017Publication date: June 7, 2018Applicant: Nanosys, Inc.Inventors: Wenzhuo GUO, Jian CHEN, Robert DUBROW, William P. FREEMAN
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Patent number: 9957395Abstract: An antimicrobial coating system and method are described. In some embodiments, a system may include a composition. The composition may include one or more bridged polycyclic compounds. At least one of the bridged polycyclic compounds may include at least two cyclic groups, and at least two of the cyclic groups may include quaternary ammonium moieties. In some embodiments, a method may include applying an antimicrobial coating to an oral surface, a surface of a construction substrate, a surface of a marine substrate, a surface of a medical device, or a surface of a personal care device. The protective coating may be antimicrobial. A protective coating may include antimicrobial bridged polycyclic compounds. Bridged polycyclic compounds may include quaternary ammonium compounds. Bridged polycyclic compounds based coating systems may impart self-cleaning properties to a surface (e.g., a tooth surface).Type: GrantFiled: September 17, 2012Date of Patent: May 1, 2018Assignee: AllAccem, Inc.Inventors: Jeffery A. Whiteford, William P. Freeman
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Patent number: 9884763Abstract: Methods for producing nanostructures, particularly Group III-V semiconductor nanostructures, are provided. The methods include use of novel Group III and/or Group V precursors, novel surfactants, oxide acceptors, high temperature, and/or stable co-products. Related compositions are also described. Methods and compositions for producing Group III inorganic compounds that can be used as precursors for nanostructure synthesis are provided. Methods for increasing the yield of nanostructures from a synthesis reaction by removal of a vaporous by-product are also described.Type: GrantFiled: April 12, 2017Date of Patent: February 6, 2018Assignee: NANOSYS, INC.Inventors: Erik C. Scher, Mihai A. Buretea, William P. Freeman, Joel Gamoras, Balxin Qian, Jeffrey A. Whiteford
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Patent number: 9884993Abstract: Highly luminescent nanostructures, particularly highly luminescent quantum dots, are provided. The nanostructures have high photoluminescence quantum yields and in certain embodiments emit light at particular wavelengths and have a narrow size distribution. The nanostructures can comprise ligands, including C5-C8 carboxylic acid ligands employed during shell formation and/or dicarboxylic or polycarboxylic acid ligands provided after synthesis. Processes for producing such highly luminescent nanostructures are also provided, including methods for enriching nanostructure cores with indium and techniques for shell synthesis.Type: GrantFiled: September 28, 2015Date of Patent: February 6, 2018Assignee: NANOSYS, INC.Inventors: Wenzhuo Guo, Jian Chen, Robert Dubrow, William P. Freeman
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Patent number: 9804319Abstract: Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.Type: GrantFiled: February 8, 2016Date of Patent: October 31, 2017Assignee: Nanosys, Inc.Inventors: Robert S. Dubrow, William P. Freeman, Ernest Lee, Paul Furuta
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Patent number: 9753212Abstract: Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.Type: GrantFiled: February 8, 2016Date of Patent: September 5, 2017Assignee: Nanosys, Inc.Inventors: Robert S. Dubrow, William P. Freeman, Ernest Lee, Paul Furuta
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Patent number: 9688534Abstract: Methods for producing nanostructures, particularly Group III-V semiconductor nanostructures, are provided. The methods include use of novel Group III and/or Group V precursors, novel surfactants, oxide acceptors, high temperature, and/or stable co-products. Related compositions are also described. Methods and compositions for producing Group III inorganic compounds that can be used as precursors for nanostructure synthesis are provided. Methods for increasing the yield of nanostructures from a synthesis reaction by removal of a vaporous by-product are also described.Type: GrantFiled: January 6, 2016Date of Patent: June 27, 2017Assignee: NANOSYS, INC.Inventors: Erik C. Scher, Mihai A. Buretea, William P. Freeman, Joel Gamoras, Baixin Qian, Jeffrey A. Whiteford
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Patent number: 9685583Abstract: Highly luminescent nanostructures, particularly highly luminescent quantum dots, are provided. The nanostructures have high photoluminescence quantum yields and in certain embodiments emit light at particular wavelengths and have a narrow size distribution. The nanostructures can comprise ligands, including C5-C8 carboxylic acid ligands employed during shell formation and/or dicarboxylic or polycarboxylic acid ligands provided after synthesis. Processes for producing such highly luminescent nanostructures are also provided, including methods for enriching nanostructure cores with indium and techniques for shell synthesis.Type: GrantFiled: March 26, 2015Date of Patent: June 20, 2017Assignee: NANOSYS, Inc.Inventors: Wenzhuo Guo, Jian Chen, Robert Dubrow, William P. Freeman
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Patent number: 9631141Abstract: Highly luminescent nanostructures, particularly highly luminescent quantum dots, are provided. The nanostructures have high photoluminescence quantum yields and in certain embodiments emit light at particular wavelengths and have a narrow size distribution. The nanostructures can comprise ligands, including C5-C8 carboxylic acid ligands employed during shell formation and/or dicarboxylic or polycarboxylic acid ligands provided after synthesis. Processes for producing such highly luminescent nanostructures are also provided, including methods for enriching nanostructure cores with indium and techniques for shell synthesis.Type: GrantFiled: March 26, 2015Date of Patent: April 25, 2017Assignee: Nanosys, Inc.Inventors: Wenzhuo Guo, Jian Chen, Robert Dubrow, William P. Freeman
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Publication number: 20160363713Abstract: Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.Type: ApplicationFiled: August 23, 2016Publication date: December 15, 2016Inventors: Robert S. Dubrow, William P. Freeman, Ernest Lee, Paul Furuta
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Publication number: 20160349428Abstract: Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.Type: ApplicationFiled: February 8, 2016Publication date: December 1, 2016Applicant: Nanosys, Inc.Inventors: Robert S. DUBROW, William P. FREEMAN, Ernest LEE, Paul FURUTA
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Patent number: 9469538Abstract: Methods for producing nanostructures, particularly Group III-V semiconductor nanostructures, are provided. The methods include use of novel Group III and/or Group V precursors, novel surfactants, oxide acceptors, high temperature, and/or stable co-products. Related compositions are also described. Methods and compositions for producing Group III inorganic compounds that can be used as precursors for nanostructure synthesis are provided. Methods for increasing the yield of nanostructures from a synthesis reaction by removal of a vaporous by-product are also described.Type: GrantFiled: October 7, 2014Date of Patent: October 18, 2016Assignee: Nanosys, Inc.Inventors: Erik C. Scher, Mihai A. Buretea, William P. Freeman, Joel Gamoras, Baixin Qian, Jeffrey A. Whiteford
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Publication number: 20160096992Abstract: Highly luminescent nanostructures, particularly highly luminescent quantum dots, are provided. The nanostructures have high photoluminescence quantum yields and in certain embodiments emit light at particular wavelengths and have a narrow size distribution. The nanostructures can comprise ligands, including C5-C8 carboxylic acid ligands employed during shell formation and/or dicarboxylic or polycarboxylic acid ligands provided after synthesis. Processes for producing such highly luminescent nanostructures are also provided, including methods for enriching nanostructure cores with indium and techniques for shell synthesis.Type: ApplicationFiled: September 28, 2015Publication date: April 7, 2016Applicant: Nanosys, Inc.Inventors: Wenzhuo Guo, Jian Chen, Robert Dubrow, William P. Freeman
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Patent number: 9260655Abstract: Quantum-dot binding ligands with easy to synthesize alkyl-acids are provided. The quantum-dot binding ligands include a multiplicity of carboxy binding ligands in combination with an alkyl backbone, and optionally a solubilizing group. The ligands and coated nanostructures of the present invention are useful for close packed nanostructure compositions, which can have improved quantum confinement and/or reduced cross-talk between nanostructures.Type: GrantFiled: March 13, 2014Date of Patent: February 16, 2016Assignee: Nanosys, Inc.Inventors: William P. Freeman, Paul T. Furuta, Robert Dubrow
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Patent number: 9212286Abstract: A coating system and method are described. In some embodiments, a system may include a composition. The composition may include one or more bridged polycyclic compounds. At least one of the bridged polycyclic compounds may include at least two cyclic groups, and at least two of the cyclic groups may include quaternary ammonium moieties. In some embodiments, a method may include applying a coating to a surface. The coating may be antimicrobial. A coating may include antimicrobial bridged polycyclic compounds. Bridged polycyclic compounds may include quaternary ammonium compounds. Bridged polycyclic compounds based coating systems may impart self-cleaning properties to a surface.Type: GrantFiled: May 6, 2010Date of Patent: December 15, 2015Assignee: AllAccem, Inc.Inventors: Jeffery A. Whiteford, William P. Freeman
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Patent number: 9199842Abstract: Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.Type: GrantFiled: November 2, 2011Date of Patent: December 1, 2015Assignee: Nanosys, Inc.Inventors: Robert S. Dubrow, William P. Freeman, Ernest Lee, Paul Furuta
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Patent number: 9169435Abstract: Highly luminescent nanostructures, particularly highly luminescent quantum dots, are provided. The nanostructures have high photoluminescence quantum yields and in certain embodiments emit light at particular wavelengths and have a narrow size distribution. The nanostructures can comprise ligands, including C5-C8 carboxylic acid ligands employed during shell formation and/or dicarboxylic or polycarboxylic acid ligands provided after synthesis. Processes for producing such highly luminescent nanostructures are also provided, including methods for enriching nanostructure cores with indium and techniques for shell synthesis.Type: GrantFiled: June 13, 2013Date of Patent: October 27, 2015Assignee: Nanosys, Inc.Inventors: Wenzhuo Guo, Jian Chen, Robert Dubrow, William P. Freeman
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Publication number: 20150300600Abstract: Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.Type: ApplicationFiled: February 3, 2015Publication date: October 22, 2015Applicant: Nanosys, Inc.Inventors: Robert S. DUBROW, William P. Freeman, Ernest Lee, Paul Furuta
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Patent number: 9149836Abstract: Ligand compositions for use in preparing discrete coated nanostructures are provided, as well as the coated nanostructures themselves and devices incorporating same. Methods for post-deposition shell formation on a nanostructure, for reversibly modifying nanostructures, and for manipulating the electronic properties of nanostructures are also provided. The ligands and coated nanostructures of the present invention are particularly useful for close packed nanostructure compositions, which can have improved quantum confinement and/or reduced cross-talk between nanostructures. Ligands of the present invention are also useful for manipulating the electronic properties of nanostructure compositions (e.g., by modulating energy levels, creating internal bias fields, reducing charge transfer or leakage, etc.).Type: GrantFiled: September 4, 2013Date of Patent: October 6, 2015Assignee: SanDisk CorporationInventors: Jeffery A. Whiteford, Mihai A. Buretea, Jian Chen, William P. Freeman, Andreas Meisel, Linh Nguyen, J. Wallace Parce, Erik C. Scher