Patents by Inventor Sharon E. Lowther
Sharon E. Lowther 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: 10435293Abstract: Formation of a boron nitride nanotube nanocomposite film by combining a boron nitride nanotube solution with a matrix such as a polymer or a ceramic to form a boron nitride nanotube/polyimide mixture and synthesizing a boron nitride nanotube/polyimide nanocomposite film as an electroactive layer.Type: GrantFiled: October 13, 2010Date of Patent: October 8, 2019Assignees: National Institute of Aerospace Associates, The United States of America as represented by the Administrator of NASAInventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison, Michael W. Smith, Sharon E. Lowther, Jae-Woo Kim, Godfrey Sauti
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Patent number: 10262951Abstract: A novel radiation hardened chip package technology protects microelectronic chips and systems in aviation/space or terrestrial devices against high energy radiation. The proposed technology of a radiation hardened chip package using rare earth elements and mulitlayered structure provides protection against radiation bombardment from alpha and beta particles to neutrons and high energy electromagnetic radiation.Type: GrantFiled: May 16, 2014Date of Patent: April 16, 2019Assignees: National Institute of Aerospace Associates, The United States of America as represented by the Administrator of NASAInventors: Jin Ho Kang, Godfrey Sauti, Cheol Park, Luke Gibbons, Sheila Ann Thibeault, Sharon E. Lowther, Robert G. Bryant
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Patent number: 10000036Abstract: Boron nitride nanotubes (BNNTs), boron nitride nanoparticles (BNNPs), carbon nontubes (CNTs), graphites, or their combinations, are incorporated into matrices of polymer, ceramic or metals. Fibers, yarns, and woven or nonwoven mates of BNNTs are uses as toughening layers in penetration resistant materials to maximize energy absorption and/or high hardness layers to rebound or deform penetrators. They can be also uses as reinforcing inclusions combining with other polymer matrices to create composite layer like typical reinforcing fibers such as Kevlar®, Spectra®, ceramics and metals. Enhanced wear resistance and prolonged usage time, even under harsh conditions, are achieved by adding boron nitride nanomaterials because both hardness and toughness are increased. Such materials can be used in high temperature environments since the oxidation temperature of BNNTs exceeds 800° C. in air.Type: GrantFiled: June 29, 2015Date of Patent: June 19, 2018Assignee: The United States of America as represented by the Administrator of NASAInventors: Jin Ho Kang, Cheol Park, Godfrey Sauti, Michael W. Smith, Kevin C. Jordan, Sharon E. Lowther, Robert G. Bryant
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Patent number: 9960288Abstract: Some implementations provide a device (e.g., solar panel) that includes an active layer and a solar absorbance layer. The active layer includes a first N-type layer and a first P-type layer. The solar absorbance layer is coupled to a first surface of the active layer. The solar absorbance layer includes a polymer composite. In some implementations, the polymer composite includes one of at least metal salts and/or carbon nanotubes. In some implementations, the active layer is configured to provide the photovoltaic effect. In some implementations, the active layer further includes a second N-type layer and a second P-type layer. In some implementations, the active layer is configured to provide the thermoelectric effect. In some implementations, the device further includes a cooling layer coupled to a second surface of the active layer. In some implementations, the cooling layer includes one of at least zinc oxides, indium oxides, and/or carbon nanotubes.Type: GrantFiled: August 8, 2013Date of Patent: May 1, 2018Assignee: The United State of America as represented by the Administrator of NASAInventors: Jin Ho Kang, Chase Taylor, Cheol Park, Godfrey Sauti, Luke Gibbons, Iseley Marshall, Sharon E. Lowther, Peter T. Lillehei, Joycelyn S. Harrison, Robert G. Bryant
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Publication number: 20170190143Abstract: Boron nitride nanotubes (BNNTs), boron nitride nanoparticles (BNNPs), carbon nontubes (CNTs), graphites, or their combinations, are incorporated into matrices of polymer, ceramic or metals. Fibers, yarns, and woven or nonwoven mates of BNNTs are uses as toughening layers in penetration resistant materials to maximize energy absorption and/or high hardness layers to rebound or deform penetrators. They can be also uses as reinforcing inclusions combining with other polymer matrices to create composite layer like typical reinforcing fibers such as Kevlar®, Spectra®, ceramics and metals. Enhanced wear resistance and prolonged usage time, even under harsh conditions, are achieved by adding boron nitride nanomaterials because both hardness and toughness are increased. Such materials can be used in high temperature environments since the oxidation temperature of BNNTs exceeds 800° C. in air.Type: ApplicationFiled: June 29, 2015Publication date: July 6, 2017Applicant: Jefferson Science Associates, LLCInventors: Jin Ho Kang, Cheol Park, Godfrey Sauti, Michael W. Smith, Kevin C. Jordan, Sharon E. Lowther, Robert G. Bryant
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Patent number: 9550870Abstract: A novel method to develop highly conductive functional materials which can effectively shield various electromagnetic effects (EMEs) and harmful radiations. Metallized nanotube polymer composites (MNPC) are composed of a lightweight polymer matrix, superstrong nanotubes (NT), and functional nanoparticle inclusions. MNPC is prepared by supercritical fluid infusion of various metal precursors (Au, Pt, Fe, and Ni salts), incorporated simultaneously or sequentially, into a solid NT-polymer composite followed by thermal reduction. The infused metal precursor tends to diffuse toward the nanotube surface preferentially as well as the surfaces of the NT-polymer matrix, and is reduced to form nanometer-scale metal particles or metal coatings. The conductivity of the MNPC increases with the metallization, which provides better shielding capabilities against various EMEs and radiations by reflecting and absorbing EM waves more efficiently.Type: GrantFiled: November 26, 2008Date of Patent: January 24, 2017Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Joycelyn S. Harrison, Negin Nazem, Larry Taylor, Jin Ho Kang, Jae-Woo Kim, Godfrey Sauti, Peter T. Lillehei, Sharon E. Lowther
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Patent number: 9550873Abstract: Some implementations provide a composite material that includes a first material and a second material. In some implementations, the composite material is a metamaterial. The first material includes a chiral polymer (e.g., crystalline chiral helical polymer, poly-?-benzyl-L-glutamate (PBLG), poly-L-lactic acid (PLA), polypeptide, and/or polyacetylene). The second material is within the chiral polymer. The first material and the second material are configured to provide an effective index of refraction value for the composite material of 1 or less. In some implementations, the effective index of refraction value for the composite material is negative. In some implementations, the effective index of refraction value for the composite material of 1 or less is at least in a wavelength of one of at least a visible spectrum, an infrared spectrum, a microwave spectrum, and/or an ultraviolet spectrum.Type: GrantFiled: July 12, 2013Date of Patent: January 24, 2017Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Jin Ho Kang, Keith L. Gordon, Godfrey Sauti, Sharon E. Lowther, Robert G. Bryant
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Patent number: 9449723Abstract: Methods for making a neutron converter layer are provided. The various embodiment methods enable the formation of a single layer neutron converter material. The single layer neutron converter material formed according to the various embodiments may have a high neutron absorption cross section, tailored resistivity providing a good electric field penetration with submicron particles, and a high secondary electron emission coefficient. In an embodiment method a neutron converter layer may be formed by sequential supercritical fluid metallization of a porous nanostructure aerogel or polyimide film. In another embodiment method a neutron converter layer may be formed by simultaneous supercritical fluid metallization of a porous nanostructure aerogel or polyimide film. In a further embodiment method a neutron converter layer may be formed by in-situ metalized aerogel nanostructure development.Type: GrantFiled: March 10, 2014Date of Patent: September 20, 2016Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Godfrey Sauti, Jin Ho Kang, Sharon E. Lowther, Sheila A. Thibeault, Robert G. Bryant
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Patent number: 9067385Abstract: Boron nitride nanotubes (BNNTs), boron nitride nanoparticles (BNNPs), carbon nanotubes (CNTs), graphites, or combinations, are incorporated into matrices of polymer, ceramic or metals. Fibers, yarns, and woven or nonwoven mats of BNNTs are used as toughening layers in penetration resistant materials to maximize energy absorption and/or high hardness layers to rebound or deform penetrators. They can be also used as reinforcing inclusions combining with other polymer matrices to create composite layers like typical reinforcing fibers such as Kevlar®, Spectra®, ceramics and metals. Enhanced wear resistance and usage time are achieved by adding boron nitride nanomaterials, increasing hardness and toughness. Such materials can be used in high temperature environments since the oxidation temperature of BNNTs exceeds 800° C. in air.Type: GrantFiled: July 26, 2011Date of Patent: June 30, 2015Assignees: Jefferson Science Associates, LLC, The United States of America as represented by the Administrator of NASAInventors: Jin Ho Kang, Cheol Park, Godfrey Sauti, Michael W. Smith, Kevin C. Jordan, Sharon E. Lowther, Robert George Bryant
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Publication number: 20150069588Abstract: A novel radiation hardened chip package technology protects microelectronic chips and systems in aviation/space or terrestrial devices against high energy radiation. The proposed technology of a radiation hardened chip package using rare earth elements and mulitlayered structure provides protection against radiation bombardment from alpha and beta particles to neutrons and high energy electromagnetic radiation.Type: ApplicationFiled: May 16, 2014Publication date: March 12, 2015Inventors: Jin Ho Kang, Godfrey Sauti, Cheol Park, Luke Gibbons, Sheila A. Thibeault, Sharon E. Lowther, Robert G. Bryant
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Publication number: 20140364529Abstract: Sequential and simultaneous methods of making a multi-metalized nanocomposite. A method includes providing a porous matrix, dissolving at least a first metal or metalloid precursor and a second metal or metalloid precursor in a supercritical carbon dioxide (CO2) fluid, wherein the first and second metal or metalloid precursors are different, infusing the supercritical CO2 fluid with the dissolved first and second metal or metalloid precursors into the porous matrix, lowering the pressure to trap the infused first and second metal or metalloid precursors in the porous matrix and reducing the first and second metal or metalloid precursors at an elevated temperature to form first and second metal or metalloid nanoparticles in the porous matrix.Type: ApplicationFiled: April 3, 2014Publication date: December 11, 2014Inventors: Cheol Park, Jin Ho Kang, Godfrey Sauti, Luke J. Gibbons, Sharon E. Lowther, Robert G. Bryant
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Publication number: 20140265057Abstract: Methods for making a neutron converter layer are provided. The various embodiment methods enable the formation of a single layer neutron converter material. The single layer neutron converter material formed according to the various embodiments may have a high neutron absorption cross section, tailored resistivity providing a good electric field penetration with submicron particles, and a high secondary electron emission coefficient. In an embodiment method a neutron converter layer may be formed by sequential supercritical fluid metallization of a porous nanostructure aerogel or polyimide film. In another embodiment method a neutron converter layer may be formed by simultaneous supercritical fluid metallization of a porous nanostructure aerogel or polyimide film. In a further embodiment method a neutron converter layer may be formed by in-situ metalized aerogel nanostructure development.Type: ApplicationFiled: March 10, 2014Publication date: September 18, 2014Applicant: U.S.A. as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Godfrey Sauti, Jin Ho Kang, Sharon E. Lowther, Sheila A. Thibeault, Robert G. Bryant
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Publication number: 20140041705Abstract: Some implementations provide a device (e.g., solar panel) that includes an active layer and a solar absorbance layer. The active layer includes a first N-type layer and a first P-type layer. The solar absorbance layer is coupled to a first surface of the active layer. The solar absorbance layer includes a polymer composite. In some implementations, the polymer composite includes one of at least metal salts and/or carbon nanotubes. In some implementations, the active layer is configured to provide the photovoltaic effect. In some implementations, the active layer further includes a second N-type layer and a second P-type layer. In some implementations, the active layer is configured to provide the thermoelectric effect. In some implementations, the device further includes a cooling layer coupled to a second surface of the active layer. In some implementations, the cooling layer includes one of at least zinc oxides, indium oxides, and/or carbon nanotubes.Type: ApplicationFiled: August 8, 2013Publication date: February 13, 2014Applicants: National Institute of Aerospace, Space AdministrationInventors: Jin Ho Kang, Chase Taylor, Cheol Park, Godfrey Sauti, Luke Gibbons, Iseley Marshall, Sharon E. Lowther, Peter T. Lillehei, Joycelyn S. Harrison, Robert G. Bryant
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Publication number: 20140017480Abstract: Some implementations provide a composite material that includes a first material and a second material. In some implementations, the composite material is a metamaterial. The first material includes a chiral polymer (e.g., crystalline chiral helical polymer, poly-?-benzyl-L-glutamate (PBLG), poly-L-lactic acid (PLA), polypeptide, and/or polyacetylene). The second material is within the chiral polymer. The first material and the second material are configured to provide an effective index of refraction value for the composite material of 1 or less. In some implementations, the effective index of refraction value for the composite material is negative. In some implementations, the effective index of refraction value for the composite material of 1 or less is at least in a wavelength of one of at least a visible spectrum, an infrared spectrum, a microwave spectrum, and/or an ultraviolet spectrum.Type: ApplicationFiled: July 12, 2013Publication date: January 16, 2014Inventors: Cheol Park, Jin Ho Kang, Keith L. Gordon, Godfrey Sauti, Sharon E. Lowther, Robert G. Bryant
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Publication number: 20130119316Abstract: Effective radiation shielding is required to protect crew and equipment in various fields including aerospace, defense, medicine and power generation. Light elements and in particular hydrogen are most effective at shielding against high-energy particles including galactic cosmic rays, solar energetic particles and fast neutrons. However, pure hydrogen is highly flammable, has a low neutron absorption cross-section, and cannot be made into structural components. Nanocomposites containing the light elements Boron, Nitrogen, Carbon and Hydrogen as well dispersed boron nano-particles, boron nitride nanotubes (BNNTs) and boron nitride nano-platelets, in a matrix, provide effective radiation shielding materials in various functional forms. Boron and nitrogen have large neutron absorption cross-sections and wide absorption spectra.Type: ApplicationFiled: May 9, 2011Publication date: May 16, 2013Applicants: National Institute of Aerospace Associates, Thomas Jefferson National Accelerator Facility, and Space AdministrationInventors: Godfrey Sauti, Cheol Park, Jin Ho Kang, Jae-Woo Kim, Joycelyn S. Harrison, Michael W. Smith, Kevin Jordan, Sharon E. Lowther, Peter T. Lillehei, Sheila A. Thibeault
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Publication number: 20120186742Abstract: Boron nitride nanotubes (BNNTs), boron nitride nanoparticles (BNNPs), carbon nanotubes (CNTs), graphites, or combinations, are incorporated into matrices of polymer, ceramic or metals. Fibers, yarns, and woven or nonwoven mats of BNNTs are used as toughening layers in penetration resistant materials to maximize energy absorption and/or high hardness layers to rebound or deform penetrators. They can be also used as reinforcing inclusions combining with other polymer matrices to create composite layers like typical reinforcing fibers such as Kevlar®, Spectra®, ceramics and metals. Enhanced wear resistance and usage time are achieved by adding boron nitride nanomaterials, increasing hardness and toughness. Such materials can be used in high temperature environments since the oxidation temperature of BNNTs exceeds 800° C. in air.Type: ApplicationFiled: July 26, 2011Publication date: July 26, 2012Applicants: National Institute of Aerospace Associates, Thomas Jefferson National Accelerator Facility, Space AdministrationInventors: Jin Ho Kang, Cheol Park, Godfrey Sauti, Michael W. Smith, Kevin C. Jordan, Sharon E. Lowther, Robert George Bryant
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Publication number: 20110192016Abstract: Electroactive actuation characteristics of novel BNNT based materials are described. Several series of BNNT based electroactive materials including BNNT/polyimide composites and BNNT films are prepared. The BNNT based electroactive materials show high piezoelectric coefficients, d13, about 14.80 pm/V as well as high electrostrictive coefficients, M13, 3.21×10?16 pm2N2. The BNNT based electroactive materials will be used for novel electromechanical energy conversion devices.Type: ApplicationFiled: October 13, 2010Publication date: August 11, 2011Applicants: National Institute of Aerospace Associates, USA as represented by the Administrator of the National Aeronautics and Space Administration, Jefferson Science Associates, LLCInventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison, Michael W. Smith, Sharon E. Lowther, Jae-Woo Kim, Godfrey Sauti
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Publication number: 20110068291Abstract: A novel method to develop highly conductive functional materials which can effectively shield various electromagnetic effects (EMEs) and harmful radiations. Metallized nanotube polymer composites (MNPC) are composed of a lightweight polymer matrix, superstrong nanotubes (NT), and functional nanoparticle inclusions. MNPC is prepared by supercritical fluid infusion of various metal precursors (Au, Pt, Fe, and Ni salts), incorporated simultaneously or sequentially, into a solid NT-polymer composite followed by thermal reduction. The infused metal precursor tends to diffuse toward the nanotube surface preferentially as well as the surfaces of the NT-polymer matrix, and is reduced to form nanometer-scale metal particles or metal coatings. The conductivity of the MNPC increases with the metallization, which provides better shielding capabilities against various EMEs and radiations by reflecting and absorbing EM waves more efficiently.Type: ApplicationFiled: November 26, 2008Publication date: March 24, 2011Applicant: National Institute of Aerospace AssociatesInventors: Cheol Park, Joycelyn S. Harrison, Negin Nazem, Larry T. Taylor, Jin Ho Kang, Jae-Woo Kim, Godfrey Sauti, Peter T. Lillehei, Sharon E. Lowther
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Patent number: 7666939Abstract: Dispersions of carbon nanotubes exhibiting long term stability are based on a polymer matrix having moieties therein which are capable of a donor-acceptor complexation with carbon nanotubes. The carbon nanotubes are introduced into the polymer matrix and separated therein by standard means. Nanocomposites produced from these dispersions are useful in the fabrication of structures, e.g., lightweight aerospace structures.Type: GrantFiled: May 11, 2006Date of Patent: February 23, 2010Assignees: National Institute of Aerospace Associates, The United States of America as represented by the Administrator of NASAInventors: Kristopher Eric Wise, Cheol Park, Emilie J. Siochi, Joycelyn S. Harrison, Peter T. Lillehei, Sharon E. Lowther
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Publication number: 20030158351Abstract: Phenylethynyl containing imide-silanes were prepared from aminoalkyl and aminoaryl alkoxy silanes and 4-phenyletbynylphthalic anhydride in toluene to form the imide in one step or in N-methyl-2-pyrrolidinone (NMP) to form the amide acid intermediate. Controlled molecular weight pendent phenylethynyl amide acid oligomers terminated with aminoaryl alkoxy silanes were prepared in NMP from aromatic dianhydrides, aromatic diamines, diamines containing pendent phenylethynyl groups and aminoaryl alkoxy silanes. The phenylethynyl containing imide-silanes and controlled molecular weight pendent phenylethynyl amide acid oligomers terminated with aminoaryl alkoxy silanes were used to improve the adhesion between phenylethynyl containing imide adhesives and inorganic substrates (i.e. metal). Hydrolysis of the alkoxy silane moiety formed a silanol functionality which reacted with the metal surface to form a metal-oxygen-silicon (oxane) bond under the appropriate reaction conditions.Type: ApplicationFiled: June 12, 2002Publication date: August 21, 2003Inventors: Joseph G. Smith, John W. Connell, Paul M. Hergenrother, Sharon E. Lowther, Cheol Park