Patents by Inventor Joycelyn S. Harrison
Joycelyn S. Harrison 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: 10124569Abstract: Disclosed is a single wall carbon nanotube (SWCNT) film electrode (FE), all-organic electroactive device systems fabricated with the SWNT-FE, and methods for making same. The SWCNT can be replaced by other types of nanotubes. The SWCNT film can be obtained by filtering SWCNT solution onto the surface of an anodized alumina membrane. A freestanding flexible SWCNT film can be collected by breaking up this brittle membrane. The conductivity of this SWCNT film can advantageously be higher than 280 S/cm. An electroactive polymer (EAP) actuator layered with the SWNT-FE shows a higher electric field-induced strain than an EAP layered with metal electrodes because the flexible SWNT-FE relieves the restraint of the displacement of the polymeric active layer as compared to the metal electrode. In addition, if thin enough, the SWNT-FE is transparent in the visible light range, thus making it suitable for use in actuators used in optical devices.Type: GrantFiled: January 26, 2017Date of Patent: November 13, 2018Assignee: The United States of America as represented by the Administrator of NASAInventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison
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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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Patent number: 9734932Abstract: Metamaterials or artificial negative index materials (NIMs) have generated great attention due to their unique and exotic electromagnetic properties. One exemplary negative dielectric constant material, which is an essential key for creating the NIMs, was developed by doping ions into a polymer, a protonated poly (benzimidazole) (PBI). The doped PBI showed a negative dielectric constant at megahertz (MHz) frequencies due to its reduced plasma frequency and an induction effect. The magnitude of the negative dielectric constant and the resonance frequency were tunable by doping concentration. The highly doped PBI showed larger absolute magnitude of negative dielectric constant at just above its resonance frequency than the less doped PBI.Type: GrantFiled: April 15, 2014Date of Patent: August 15, 2017Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Keith L. Gordon, Jin Ho Kang, Cheol Park, Peter T. Lillehei, Joycelyn S. Harrison
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Publication number: 20170144428Abstract: Disclosed is a single wall carbon nanotube (SWCNT) film electrode (FE), all-organic electroactive device systems fabricated with the SWNT-FE, and methods for making same. The SWCNT can be replaced by other types of nanotubes. The SWCNT film can be obtained by filtering SWCNT solution onto the surface of an anodized alumina membrane. A freestanding flexible SWCNT film can be collected by breaking up this brittle membrane. The conductivity of this SWCNT film can advantageously be higher than 280 S/cm. An electroactive polymer (EAP) actuator layered with the SWNT-FE shows a higher electric field-induced strain than an EAP layered with metal electrodes because the flexible SWNT-FE relieves the restraint of the displacement of the polymeric active layer as compared to the metal electrode. In addition, if thin enough, the SWNT-FE is transparent in the visible light range, thus making it suitable for use in actuators used in optical devices.Type: ApplicationFiled: January 26, 2017Publication date: May 25, 2017Inventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison
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Patent number: 9587089Abstract: Conventional toughening agents are typically rubbery materials or small molecular weight molecules, which mostly sacrifice the intrinsic properties of a matrix such as modulus, strength, and thermal stability as side effects. On the other hand, high modulus inclusions tend to reinforce elastic modulus very efficiently, but not the strength very well. For example, mechanical reinforcement with inorganic inclusions often degrades the composite toughness, encountering a frequent catastrophic brittle failure triggered by minute chips and cracks. Thus, toughening generally conflicts with mechanical reinforcement. Carbon nanotubes have been used as efficient reinforcing agents in various applications due to their combination of extraordinary mechanical, electrical, and thermal properties.Type: GrantFiled: July 6, 2015Date of Patent: March 7, 2017Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Dennis C. Working, Emilie J. Siochi, Joycelyn S. Harrison
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Patent number: 9579867Abstract: Disclosed is a single wall carbon nanotube (SWCNT) film electrode (FE), all-organic electroactive device systems fabricated with the SWNT-FE, and methods for making same. The SWCNT can be replaced by other types of nanotubes. The SWCNT film can be obtained by filtering SWCNT solution onto the surface of an anodized alumina membrane. A freestanding flexible SWCNT film can be collected by breaking up this brittle membrane. The conductivity of this SWCNT film can advantageously be higher than 280 S/cm. An electroactive polymer (EAP) actuator layered with the SWNT-FE shows a higher electric field-induced strain than an EAP layered with metal electrodes because the flexible SWNT-FE relieves the restraint of the displacement of the polymeric active layer as compared to the metal electrode. In addition, if thin enough, the SWNT-FE is transparent in the visible light range, thus making it suitable for use in actuators used in optical devices.Type: GrantFiled: July 10, 2013Date of Patent: February 28, 2017Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison
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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: 9493635Abstract: Stable dispersions of carbon nanotubes (CNTs) in polymeric matrices include CNTs dispersed in a host polymer or copolymer whose monomers have delocalized electron orbitals, so that a dispersion interaction results between the host polymer or copolymer and the CNTs dispersed therein. Nanocomposite products, which are presented in bulk, or when fabricated as a film, fiber, foam, coating, adhesive, paste, or molding, are prepared by standard means from the present stable dispersions of CNTs in polymeric matrices, employing dispersion interactions, as presented hereinabove.Type: GrantFiled: December 22, 2006Date of Patent: November 15, 2016Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Kristopher Eric Wise, Cheol Park, Jin Ho Kang, Emilie J. Siochi, Joycelyn S. Harrison
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Publication number: 20150307691Abstract: Conventional toughening agents are typically rubbery materials or small molecular weight molecules, which mostly sacrifice the intrinsic properties of a matrix such as modulus, strength, and thermal stability as side effects. On the other hand, high modulus inclusions tend to reinforce elastic modulus very efficiently, but not the strength very well. For example, mechanical reinforcement with inorganic inclusions often degrades the composite toughness, encountering a frequent catastrophic brittle failure triggered by minute chips and cracks. Thus, toughening generally conflicts with mechanical reinforcement. Carbon nanotubes have been used as efficient reinforcing agents in various applications due to their combination of extraordinary mechanical, electrical, and thermal properties.Type: ApplicationFiled: July 6, 2015Publication date: October 29, 2015Inventors: Cheol Park, Dennis C. WORKING, Emilie J. SIOCHI, Joycelyn S. HARRISON
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Publication number: 20150258748Abstract: Disclosed is a single wall carbon nanotube (SWCNT) film electrode (FE), all-organic electroactive device systems fabricated with the SWNT-FE, and methods for making same. The SWCNT can be replaced by other types of nanotubes. The SWCNT film can be obtained by filtering SWCNT solution onto the surface of an anodized alumina membrane. A freestanding flexible SWCNT film can be collected by breaking up this brittle membrane. The conductivity of this SWCNT film can advantageously be higher than 280 S/cm. An electroactive polymer (EAP) actuator layered with the SWNT-FE shows a higher electric field-induced strain than an EAP layered with metal electrodes because the flexible SWNT-FE relieves the restraint of the displacement of the polymeric active layer as compared to the metal electrode. In addition, if thin enough, the SWNT-FE is transparent in the visible light range, thus making it suitable for use in actuators used in optical devices.Type: ApplicationFiled: July 10, 2013Publication date: September 17, 2015Inventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison
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Patent number: 9074066Abstract: Conventional toughening agents are typically rubbery materials or small molecular weight molecules, which mostly sacrifice the intrinsic properties of a matrix such as modulus, strength, and thermal stability as side effects. On the other hand, high modulus inclusions tend to reinforce elastic modulus very efficiently, but not the strength very well. For example, mechanical reinforcement with inorganic inclusions often degrades the composite toughness, encountering a frequent catastrophic brittle failure triggered by minute chips and cracks. Thus, toughening generally conflicts with mechanical reinforcement. Carbon nanotubes have been used as efficient reinforcing agents in various applications due to their combination of extraordinary mechanical, electrical, and thermal properties.Type: GrantFiled: February 22, 2011Date of Patent: July 7, 2015Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Dennis C. Working, Emilie J. Siochi, Joycelyn S. Harrison
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Publication number: 20140287904Abstract: Metamaterials or artificial negative index materials (NIMs) have generated great attention due to their unique and exotic electromagnetic properties. One exemplary negative dielectric constant material, which is an essential key for creating the NIMs, was developed by doping ions into a polymer, a protonated poly (benzimidazole) (FBI). The doped PBI showed a negative dielectric constant at megahertz (MHz) frequencies due to its reduced plasma frequency and an induction effect. The magnitude of the negative dielectric constant and the resonance frequency were tunable by doping concentration. The highly doped PBI showed larger absolute magnitude of negative dielectric constant at just above its resonance frequency than the less doped PBI.Type: ApplicationFiled: April 15, 2014Publication date: September 25, 2014Applicant: U.S.A. as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Keith L. GORDON, Jin Ho KANG, Cheol PARK, Peter T. LILLEHEI, Joycelyn S. HARRISON
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Patent number: 8696940Abstract: Metamaterials or artificial negative index materials (NIMs) have generated great attention due to their unique and exotic electromagnetic properties. One exemplary negative dielectric constant material, which is an essential key for creating the NIMs, was developed by doping ions into a polymer, a protonated poly(benzimidazole) (PBI). The doped PBI showed a negative dielectric constant at megahertz (MHz) frequencies due to its reduced plasma frequency and an induction effect. The magnitude of the negative dielectric constant and the resonance frequency were tunable by doping concentration. The highly doped PBI showed larger absolute magnitude of negative dielectric constant at just above its resonance frequency than the less doped PBI.Type: GrantFiled: September 29, 2010Date of Patent: April 15, 2014Assignee: United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Keith L. Gordon, Jin Ho Kang, Cheol Park, Peter T. Lillehei, Joycelyn S. Harrison
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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: 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: 20120107594Abstract: Disclosed is a single wall carbon nanotube (SWCNT) film electrode (FE), all-organic electroactive device systems fabricated with the SWNT-FE, and methods for making same. The SWCNT can be replaced by other types of nanotubes. The SWCNT film can be obtained by filtering SWCNT solution onto the surface of an anodized alumina membrane. A freestanding flexible SWCNT film can be collected by breaking up this brittle membrane. The conductivity of this SWCNT film can advantageously be higher than 280 S/cm. An electroactive polymer (EAP) actuator layered with the SWNT-FE shows a higher electric field-induced strain than an EAP layered with metal electrodes because the flexible SWNT-FE relieves the restraint of the displacement of the polymeric active layer as compared to the metal electrode. In addition, if thin enough, the SWNT-FE is transparent in the visible light range, thus making it suitable for use in actuators used in optical devices.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Applicant: U.S.A. as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Jin Ho Kang, Cheol Park, Joycelyn S. Harrison
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Patent number: 7998368Abstract: Carbon nanotubes (CNTs) are dispersed in an aqueous buffer solution consisting of at least 50 weight percent water and a remainder weight percent that includes a buffer material. The buffer material has a molecular structure defined by a first end, a second end, and a middle disposed between the first and second ends. The first end is a cyclic ring with nitrogen and oxygen heteroatomes, the middle is a hydrophobic alkyl chain, and the second end is a charged group.Type: GrantFiled: November 18, 2008Date of Patent: August 16, 2011Assignee: United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Jae-Woo Kim, Cheol Park, Sang H. Choi, Peter T. Lillehei, Joycelyn S. Harrison
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Publication number: 20110192319Abstract: Conventional toughening agents are typically rubbery materials or small molecular weight molecules, which mostly sacrifice the intrinsic properties of a matrix such as modulus, strength, and thermal stability as side effects. On the other hand, high modulus inclusions tend to reinforce elastic modulus very efficiently, but not the strength very well. For example, mechanical reinforcement with inorganic inclusions often degrades the composite toughness, encountering a frequent catastrophic brittle failure triggered by minute chips and cracks. Thus, toughening generally conflicts with mechanical reinforcement. Carbon nanotubes have been used as efficient reinforcing agents in various applications due to their combination of extraordinary mechanical, electrical, and thermal properties.Type: ApplicationFiled: February 22, 2011Publication date: August 11, 2011Applicant: USA as represented by the Administrator of the National Aeronautics and Space AdmiInventors: Cheol Park, Dennis C. Working, Emilie J. Siochi, Joycelyn S. Harrison
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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