Patents by Inventor Zoubeida Ounaies
Zoubeida Ounaies 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: 11525087Abstract: Self-aligned liquid crystal materials and structures are disclosed. The structures can exhibit piezoelectric and flexoelectric properties.Type: GrantFiled: March 9, 2020Date of Patent: December 13, 2022Assignee: PPG Industries Ohio, Inc.Inventors: Cynthia Kutchko, Zoubeida Ounaies, Hassene Ben Atitallah, Nicholas Wyckoff, Anil Kumar, Romain Stalder, David Walters
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Publication number: 20200263092Abstract: Self-aligned liquid crystal materials and structures are disclosed. The structures can exhibit piezoelectric and flexoelectric properties.Type: ApplicationFiled: March 9, 2020Publication date: August 20, 2020Inventors: CYNTHIA KUTCHKO, ZOUBEIDA OUNAIES, HASSENE BEN ATITALLAH, NICHOLAS WYCKOFF, ANIL KUMAR, ROMAIN STALDER, DAVID WALTERS
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Patent number: 10619099Abstract: Self-aligned liquid crystal materials and structures are disclosed. The structures can exhibit piezoelectric and flexoelectric properties.Type: GrantFiled: August 25, 2017Date of Patent: April 14, 2020Assignee: PPG Industries Ohio, Inc.Inventors: Cynthia Kutchko, Zoubeida Ounaies, Hassene Ben Atitallah, Nicholas Wyckoff, Anil Kumar, Romain Stalder, David Walters
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Publication number: 20190062635Abstract: Self-aligned liquid crystal materials and structures are disclosed. The structures can exhibit piezoelectric and flexoelectric properties.Type: ApplicationFiled: August 25, 2017Publication date: February 28, 2019Inventors: CYNTHIA KUTCHKO, ZOUBEIDA OUNAIES, HASSENE BEN ATITALLAH, NICHOLAS WYCKOFF, ANIL KUMAR, ROMAIN STALDER, DAVID WALTERS
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Patent number: 7972536Abstract: The present invention is directed to the effective dispersion of carbon nanotubes (CNTs) into polymer matrices. The nanocomposites are prepared using polymer matrices and exhibit a unique combination of properties, most notably, high retention of optical transparency in the visible range (i.e., 400-800 nm), electrical conductivity, and high thermal stability. By appropriate selection of the matrix resin, additional properties such as vacuum ultraviolet radiation resistance, atomic oxygen resistance, high glass transition (Tg) temperatures, and excellent toughness can be attained. The resulting nanocomposites can be used to fabricate or formulate a variety of articles such as coatings on a variety of substrates, films, foams, fibers, threads, adhesives and fiber coated prepreg. The properties of the nanocomposites can be adjusted by selection of the polymer matrix and CNT to fabricate articles that possess high optical transparency and antistatic behavior.Type: GrantFiled: August 25, 2009Date of Patent: July 5, 2011Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: John W. Connell, Joseph G. Smith, Jr., Joycelyn S. Harrison, Cheol Park, Kent A. Watson, Zoubeida Ounaies
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Patent number: 7935414Abstract: An electroactive material comprises multiple layers of electroactive composite with each layer having unique dielectric, electrical and mechanical properties that define an electromechanical operation thereof when affected by an external stimulus. For example, each layer can be (i) a 2-phase composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electomechanical operation, or (ii) a 3-phase composite having the elements of the 2-phase composite and further including a third component of micro-sized to nano-sized particles of an electroactive ceramic incorporated in the polymer matrix.Type: GrantFiled: March 18, 2009Date of Patent: May 3, 2011Assignee: United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn S. Harrison, Nancy M. Holloway, Gregory K. Draughon
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Patent number: 7906043Abstract: The present invention is directed to the effective dispersion of carbon nanotubes (CNTs) into polymer matrices. The nanocomposites are prepared using polymer matrices and exhibit a unique combination of properties, most notably, high retention of optical transparency in the visible range (i.e., 400-800 nm), electrical conductivity, and high thermal stability. By appropriate selection of the matrix resin, additional properties such as vacuum ultraviolet radiation resistance, atomic oxygen resistance, high glass transition (Tg) temperatures, and excellent toughness can be attained. The resulting nanocomposites can be used to fabricate or formulate a variety of articles such as coatings on a variety of substrates, films, foams, fibers, threads, adhesives and fiber coated prepreg. The properties of the nanocomposites can be adjusted by selection of the polymer matrix and CNT to fabricate articles that possess high optical transparency and antistatic behavior.Type: GrantFiled: August 31, 2009Date of Patent: March 15, 2011Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: John W. Connell, Joseph G. Smith, Joycelyn S. Harrison, Cheol Park, Kent A. Watson, Zoubeida Ounaies
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Publication number: 20100084618Abstract: The present invention is directed to the effective dispersion of carbon nanotubes (CNTs) into polymer matrices. The nanocomposites are prepared using polymer matrices and exhibit a unique combination of properties, most notably, high retention of optical transparency in the visible range (i.e., 400-800 nm), electrical conductivity, and high thermal stability. By appropriate selection of the matrix resin, additional properties such as vacuum ultraviolet radiation resistance, atomic oxygen resistance, high glass transition (Tg) temperatures, and excellent toughness can be attained. The resulting nanocomposites can be used to fabricate or formulate a variety of articles such as coatings on a variety of substrates, films, foams, fibers, threads, adhesives and fiber coated prepreg. The properties of the nanocomposites can be adjusted by selection of the polymer matrix and CNT to fabricate articles that possess high optical transparency and antistatic behavior.Type: ApplicationFiled: August 25, 2009Publication date: April 8, 2010Applicant: USA as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: John W. Connell, Joseph G. Smith, JR., Joycelyn S. Harrison, Cheol Park, Kent A. Watson, Zoubeida Ounaies
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Publication number: 20100078600Abstract: The present invention is directed to the effective dispersion of carbon nanotubes (CNTs) into polymer matrices. The nanocomposites are prepared using polymer matrices and exhibit a unique combination of properties, most notably, high retention of optical transparency in the visible range (i.e., 400-800 nm), electrical conductivity, and high thermal stability. By appropriate selection of the matrix resin, additional properties such as vacuum ultraviolet radiation resistance, atomic oxygen resistance, high glass transition (Tg) temperatures, and excellent toughness can be attained. The resulting nanocomposites can be used to fabricate or formulate a variety of articles such as coatings on a variety of substrates, films, foams, fibers, threads, adhesives and fiber coated prepreg. The properties of the nanocomposites can be adjusted by selection of the polymer matrix and CNT to fabricate articles that possess high optical transparency and antistatic behavior.Type: ApplicationFiled: August 31, 2009Publication date: April 1, 2010Applicant: USA as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: John W. Connell, Joseph G. Smith, Joycelyn S. Harrison, Cheol Park, Kent A. Watson, Zoubeida Ounaies
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Publication number: 20100068485Abstract: An electroactive material comprises multiple layers of electroactive composite with each layer having unique dielectric, electrical and mechanical properties that define an electromechanical operation thereof when affected by an external stimulus. For example, each layer can be (i) a 2-phase composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electomechanical operation, or (ii) a 3-phase composite having the elements of the 2-phase composite and further including a third component of micro-sized to nano-sized particles of an electroactive ceramic incorporated in the polymer matrix.Type: ApplicationFiled: March 18, 2009Publication date: March 18, 2010Applicant: USA as represented by the Administrator of the National Aeronautics Space AdministrationInventors: Zoubeida OUNAIES, Cheol PARK, Joycelyn S. HARRISON, Nancy M. HOLLOWAY, Gregory K. DRAUGHON
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Patent number: 7588699Abstract: The present invention is directed to the effective dispersion of carbon nanotubes (CNTs) into polymer matrices. The nanocomposites are prepared using polymer matrices and exhibit a unique combination of properties, most notably, high retention of optical transparency in the visible range (i.e., 400–800 nm), electrical conductivity, and high thermal stability. By appropriate selection of the matrix resin, additional properties such as vacuum ultraviolet radiation resistance, atomic oxygen resistance, high glass transition (Tg) temperatures, and excellent toughness can be attained. The resulting nanocomposites can be used to fabricate or formulate a variety of articles such as coatings on a variety of substrates, films, foams, fibers, threads, adhesives and fiber coated prepreg. The properties of the nanocomposites can be adjusted by selection of the polymer matrix and CNT to fabricate articles that possess high optical transparency and antistatic behavior.Type: GrantFiled: November 1, 2002Date of Patent: September 15, 2009Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Cheol Park, Kent A. Watson, Zoubeida Ounaies, John W. Connell, Joseph G. Smith, Joycelyn S. Harrison
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Patent number: 7527751Abstract: An electroactive sensing or actuating material comprises a composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electromechanical operation of the composite when such composite is affected by an external stimulus. In another embodiment, the composite comprises a third component of micro-sized to nano-sized particles of an electroactive ceramic that is also incorporated in the polymer matrix. The method for making the three-phase composite comprises either incorporating the carbon nanotubes in the polymer matrix before incorporation of the particles of ceramic or mixing the carbon nanotubes and particles of ceramic together in a solution before incorporation in the polymer matrix.Type: GrantFiled: April 25, 2008Date of Patent: May 5, 2009Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn S. Harrison, Nancy M. Holloway, Gregory K. Draughon
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Patent number: 7507472Abstract: An electroactive material comprises multiple layers of electroactive composite with each layer having unique dielectric, electrical and mechanical properties that define an electromechanical operation thereof when affected by an external stimulus. For example, each layer can be (i) a 2-phase composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electomechanical operation, or (ii) a 3-phase composite having the elements of the 2-phase composite and further including a third component of micro-sized to nano-sized particles of an electroactive ceramic incorporated in the polymer matrix.Type: GrantFiled: March 9, 2005Date of Patent: March 24, 2009Assignee: The United States of America as represented by the Administator of National Aeronatics and Space AdminstrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn S. Harrison, Nancy M. Holloway, Gregory K. Draughon
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Publication number: 20090036975Abstract: A medically implantable stent comprising at least one piezo-electric material may be active, such as by one or more of: delivering an anti-coagulant or other therapeutic effect to a patient in which it is implanted; powering itself; and/or sending an outbound electronic signal to a remote device. When a stent can send such an outbound signal, a physician may non-invasively ascertain the condition of the tissue near the stent.Type: ApplicationFiled: December 12, 2006Publication date: February 5, 2009Inventors: Kevin Ward, Zoubeida Ounaies, George Vetrovec
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Sensing/Actuating Materials Made From Carbon Nanotube Polymer Composites and Methods for Making Same
Publication number: 20080287589Abstract: An electroactive sensing or actuating material comprises a composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electromechanical operation of the composite when such composite is affected by an external stimulus. In another embodiment, the composite comprises a third component of micro-sized to nano-sized particles of an electroactive ceramic that is also incorporated in the polymer matrix. The method for making the three-phase composite comprises either incorporating the carbon nanotubes in the polymer matrix before incorporation of the particles of ceramic or mixing the carbon nanotubes and particles of ceramic together in a solution before incorporation in the polymer matrix.Type: ApplicationFiled: April 25, 2008Publication date: November 20, 2008Applicants: Space AdministrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn S. Harrison, Nancy M. Holloway, Gregory K. Draughon -
Sensing/actuating materials made from carbon nanotube polymer composites and methods for making same
Patent number: 7402264Abstract: An electroactive sensing or actuating material comprises a composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electomechanical operation of the composite when such composite is affected by an external stimulus. In another embodiment, the composite comprises a third component of micro-sized to nano-sized particles of an electroactive ceramic that is also incorporated in the polymer matrix. The method for making the three-phase composite comprises either incorporating the carbon nanotubes in the polymer matrix before incorporation of the particles of ceramic or mixing the carbon nanotubes and particles of ceramic together in a solution before incorporation in the polymer matrix.Type: GrantFiled: March 3, 2005Date of Patent: July 22, 2008Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn S. Harrison, Nancy M. Holloway, Gregory K. Draughon -
Sensing/actuating materials made from carbon nanotube polymer composites and methods for making same
Publication number: 20060084752Abstract: An electroactive sensing or actuating material comprises a composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electomechanical operation of the composite when such composite is affected by an external stimulus. In another embodiment, the composite comprises a third component of micro-sized to nano-sized particles of an electroactive ceramic that is also incorporated in the polymer matrix. The method for making the three-phase composite comprises either incorporating the carbon nanotubes in the polymer matrix before incorporation of the particles of ceramic or mixing the carbon nanotubes and particles of ceramic together in a solution before incorporation in the polymer matrix.Type: ApplicationFiled: March 3, 2005Publication date: April 20, 2006Applicant: USA as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn Harrison, Nancy Holloway, Gregory Draughon -
Publication number: 20060057361Abstract: An electroactive material comprises multiple layers of electroactive composite with each layer having unique dielectric, electrical and mechanical properties that define an electromechanical operation thereof when affected by an external stimulus. For example, each layer can be (i) a 2-phase composite made from a polymer with polarizable moieties and an effective amount of carbon nanotubes incorporated in the polymer for a predetermined electomechanical operation, or (ii) a 3-phase composite having the elements of the 2-phase composite and further including a third component of micro-sized to nano-sized particles of an electroactive ceramic incorporated in the polymer matrix.Type: ApplicationFiled: March 9, 2005Publication date: March 16, 2006Applicant: USA as represented by the Administrator of the National Aeronautics & Space AdministrationInventors: Zoubeida Ounaies, Cheol Park, Joycelyn Harrison, Nancy Holloway, Gregory Draughon
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Publication number: 20060057377Abstract: Electroactive polymers are produced via electrospinning. The induction of electroactivity via electrospinning can be utilized with one or more soluble polymers with polarizable moieties. Suitable polymer classes include but are not limited to polyimides, polyamides, vinyl polymers, polyurethanes, polyureas, polythioureas, polyacrylates, polyesters, and biopolymers. Any one or more solvents sufficient to dissolve the one or more polymers of interest and make a spinnable solution can be utilized. The polymer can be electrospun into fiber and fibrous nonwoven mat. The electroactive polymer can be doped with inclusions, such as nanotubes, nanofibers, and piezoceramic powders for dielectric enhancement The availability of electroactive polymer fibers and fibrous nonwoven mat will enable many new applications for electroactive polymers.Type: ApplicationFiled: December 18, 2004Publication date: March 16, 2006Applicant: U.S.A.as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Joycelyn Harrison, Kristin Burney, Zoubeida Ounaies, Cheol Park, Emilie Siochi
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Patent number: 6689288Abstract: The invention described herein supplies a new class of electroactive polymeric blend materials which offer both sensing and actuation dual functionality. The blend comprises two components, one component having a sensing capability and the other component having an actuating capability. These components should be co-processable and coexisting in a phase separated blend system. Specifically, the materials are blends of a sensing component selected from the group consisting of ferroelectric, piezoelectric, pyroelectric and photoelectric polymers and an actuating component that responds to an electric field in terms of dimensional change. Said actuating component includes, but is not limited to, electrostrictive graft elastomers, dielectric electroactive elastomers, liquid crystal electroactive elastomers and field responsive polymeric gels. The sensor functionality and actuation functionality are designed by tailoring the relative fraction of the two components.Type: GrantFiled: November 28, 2001Date of Patent: February 10, 2004Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Terry L. St. Clair, Joycelyn S. Harrison, Ji Su, Zoubeida Ounaies