Patents by Inventor Jeffery A. Whiteford
Jeffery A. Whiteford 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: 20080207581Abstract: 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: ApplicationFiled: May 2, 2007Publication date: August 28, 2008Inventors: Jeffery A. Whiteford, William P. Freeman
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Publication number: 20080118755Abstract: 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: ApplicationFiled: December 9, 2005Publication date: May 22, 2008Applicant: NANOSYS, Inc.Inventors: Jeffery A. Whiteford, Mihai A. Buretea, Jian Chen, William P. Freeman, Andreas Meisel, Linh Nguyen, J. Wallace Parce, Erik Scher
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Patent number: 7374807Abstract: The present invention provides matrixes doped with semiconductor nanocrystals. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. The present invention also provides processes for producing matrixes comprising semiconductor nanocrystals.Type: GrantFiled: January 13, 2005Date of Patent: May 20, 2008Assignee: Nanosys, Inc.Inventors: J. Wallace Parce, Jian Chen, Bob Dubrow, Bill Freeman, Erik C. Scher, Jeffery A. Whiteford
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Patent number: 7368564Abstract: This invention is related to the fields of organic chemistry and nanotechnology. In particular, it relates to materials and methods for the preparation of organic synthons and bridged macrocyclic module compounds. The bridged macrocyclic module compounds may be used to prepare macrocyclic compositions such as nanofilms, which may be useful for filtration.Type: GrantFiled: August 6, 2004Date of Patent: May 6, 2008Assignee: Covalent Partners, LLCInventors: Jeffery A. Whiteford, William Freeman, Joshua W. Kriesel
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Patent number: 7339184Abstract: The present invention is directed to methods to harvest, integrate and exploit nanomaterials, and particularly elongated nanowire materials. The invention provides methods for harvesting nanowires that include selectively etching a sacrificial layer placed on a nanowire growth substrate to remove nanowires. The invention also provides methods for integrating nanowires into electronic devices that include placing an outer surface of a cylinder in contact with a fluid suspension of nanowires and rolling the nanowire coated cylinder to deposit nanowires onto a surface. Methods are also provided to deposit nanowires using an ink-jet printer or an aperture to align nanowires. Additional aspects of the invention provide methods for preventing gate shorts in nanowire based transistors. Additional methods for harvesting and integrating nanowires are provided.Type: GrantFiled: April 29, 2005Date of Patent: March 4, 2008Assignee: Nanosys, IncInventors: Linda T. Romano, Jian Chen, Xiangfeng Duan, Robert S. Dubrow, Stephen A. Empedocles, Jay L. Goldman, James M. Hamilton, David L. Heald, Francesco Lemmi, Chunming Niu, Yaoling Pan, George Pontis, Vijendra Sahi, Erik C. Scher, David P. Stumbo, Jeffery A. Whiteford
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Publication number: 20080041814Abstract: The present invention is directed to methods to harvest, integrate and exploit nanomaterials, and particularly elongated nanowire materials. The invention provides methods for harvesting nanowires that include selectively etching a sacrificial layer placed on a nanowire growth substrate to remove nanowires. The invention also provides methods for integrating nanowires into electronic devices that include placing an outer surface of a cylinder in contact with a fluid suspension of nanowires and rolling the nanowire coated cylinder to deposit nanowires onto a surface. Methods are also provided to deposit nanowires using an ink-jet printer or an aperture to align nanowires. Additional aspects of the invention provide methods for preventing gate shorts in nanowire based transistors. Additional methods for harvesting and integrating nanowires are provided.Type: ApplicationFiled: August 16, 2007Publication date: February 21, 2008Applicant: NANOSYS, INC.Inventors: Linda Romano, Jian Chen, Xiangfeng Duan, Robert Dubrow, Stephen Empedocles, Jay Goldman, James Hamilton, David Heald, Francesco Lemmi, Chunming Niu, Yaoling Pan, George Pontis, Vijendra Sahi, Erik Scher, David Stumbo, Jeffery Whiteford
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Publication number: 20080032134Abstract: 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 and for reversibly modifying 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.Type: ApplicationFiled: February 13, 2007Publication date: February 7, 2008Applicant: NANOSYS, Inc.Inventors: Jeffery Whiteford, Rhett Brewer, Mihai Buretea, Jian Chen, Karen Cruden, Xiangfeng Duan, William Freeman, David Heald, Francisco Leon, Chao Liu, Andreas Meisel, Kyu Min, J. Parce, Erik Scher
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Publication number: 20080020235Abstract: The present invention provides matrixes doped with semiconductor nanocrystals. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. The present invention also provides processes for producing matrixes comprising semiconductor nanocrystals.Type: ApplicationFiled: November 7, 2006Publication date: January 24, 2008Applicant: Nanosys, Inc.Inventors: J. Parce, Jian Chen, Robert Dubrow, William Freeman, Erik Scher, Jeffery Whiteford
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Publication number: 20080021212Abstract: 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 an antimicrobial composition 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: ApplicationFiled: May 3, 2007Publication date: January 24, 2008Inventors: Jeffery Whiteford, William Freeman
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Publication number: 20080020127Abstract: 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 of a medical device. 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: ApplicationFiled: May 2, 2007Publication date: January 24, 2008Inventors: Jeffery Whiteford, William Freeman
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Patent number: 7267875Abstract: 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 and for reversibly modifying 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.Type: GrantFiled: June 7, 2005Date of Patent: September 11, 2007Assignee: Nanosys, Inc.Inventors: Jeffery A. Whiteford, Mihai Buretea, William P. Freeman, Andreas Meisel, Kyu S. Min, J. Wallace Parce, Erik Scher
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Publication number: 20070202342Abstract: 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: ApplicationFiled: December 12, 2006Publication date: August 30, 2007Inventors: Jeffery Whiteford, William Freeman
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Publication number: 20070034833Abstract: Matrixes doped with semiconductor nanocrystals are provided. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. Processes for producing matrixes comprising semiconductor nanocrystals are also provided.Type: ApplicationFiled: July 24, 2006Publication date: February 15, 2007Inventors: J. Parce, Paul Bernatis, Robert Dubrow, William Freeman, Joel Gamoras, Shihai Kan, Andreas Meisel, Baixin Qian, Jeffery Whiteford, Jonathan Ziebarth
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Publication number: 20060159916Abstract: 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: May 5, 2004Publication date: July 20, 2006Applicant: NANOSYS, Inc.Inventors: Robert Dubrow, Robert Daniels, J. Parce, Matthew Murphy, Jim Hamilton, Erik Scher, Dave Stumbo, Chunming Niu, Linda Romano, Jay Goldman, Vijendra Sahi, Jeffery Whiteford
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Publication number: 20060128680Abstract: Macrocyclic module compositions are made from cyclic synthons. The macrocyclic module structures are prepared by stepwise or concerted schemes which couple synthons in a closed ring. The macrocyclic module structures may have a pore of nanometer dimensions.Type: ApplicationFiled: August 8, 2005Publication date: June 15, 2006Inventors: Josh Kriesel, Timothy Karpishin, Donald Bivin, Grant Merrill, Martin Edelstein, Thomas Smith, Jeffery Whiteford, Robert Jonas
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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: 20060068154Abstract: The present invention provides matrixes doped with semiconductor nanocrystals. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. The present invention also provides processes for producing matrixes comprising semiconductor nanocrystals.Type: ApplicationFiled: January 13, 2005Publication date: March 30, 2006Applicant: NANOSYS, Inc.Inventors: J. Parce, Jian Chen, Robert Dubrow, William Freeman, Erik Scher, Jeffery Whiteford
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Publication number: 20060040103Abstract: 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 and for reversibly modifying 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.Type: ApplicationFiled: June 7, 2005Publication date: February 23, 2006Applicant: NANOSYS, Inc.Inventors: Jeffery Whiteford, Rhett Brewer, Mihai Buretea, Jian Chen, Karen Cruden, Xiangfeng Duan, William Freeman, David Heald, Francisco Leon, Chao Liu, Andreas Meisel, Kyu Min, J. Parce, Erik Scher
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Publication number: 20060008942Abstract: The present invention is directed to methods to harvest, integrate and exploit nanomaterials, and particularly elongated nanowire materials. The invention provides methods for harvesting nanowires that include selectively etching a sacrificial layer placed on a nanowire growth substrate to remove nanowires. The invention also provides methods for integrating nanowires into electronic devices that include placing an outer surface of a cylinder in contact with a fluid suspension of nanowires and rolling the nanowire coated cylinder to deposit nanowires onto a surface. Methods are also provided to deposit nanowires using an ink-jet printer or an aperture to align nanowires. Additional aspects of the invention provide methods for preventing gate shorts in nanowire based transistors. Additional methods for harvesting and integrating nanowires are provided.Type: ApplicationFiled: April 29, 2005Publication date: January 12, 2006Applicant: Nanosys, Inc.Inventors: Linda Romano, Jian Chen, Xiangfeng Duan, Robert Dubrow, Stephen Empedocles, Jay Goldman, James Hamilton, David Heald, Francesco Lemmi, Chunming Niu, Yaoling Pan, George Pontis, Vijendra Sahi, Erik Scher, David Stumbo, Jeffery Whiteford
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Patent number: 6949206Abstract: The present invention provides compositions (small molecules, oligomers and polymers) that can be used to modify charge transport across a nanocrystal surface or within a nanocrystal-containing matrix, as well as methods for making and using the novel compositions.Type: GrantFiled: September 4, 2003Date of Patent: September 27, 2005Assignee: Nanosys, Inc.Inventors: Jeffery A. Whiteford, Mihai A. Buretea, Erik Scher