Patents by Inventor Karen Lozano

Karen Lozano 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).

  • Publication number: 20170081786
    Abstract: A method of producing doped carbon fibers, doped systems to prepare graphene-fiber hybrid structures, or doped carbon nanostructures, includes forming doped polymer precursors and decomposing at least a portion of the polymeric precursors to form carbon fibers. The decomposition may be accomplished by treating the doped polymer precursors with acid vapor from an aqueous acid solution at a temperature of less than 250° C.
    Type: Application
    Filed: September 22, 2016
    Publication date: March 23, 2017
    Inventors: Karen Lozano, Lee Daniel Cremar, Maria del Rocio Nava Lara, Mandana Akia
  • Publication number: 20150184317
    Abstract: A method of producing carbon fiber, yarns, and nonwoven carbon fiber cloths, includes forming suitable polymeric precursor microfibers and/or nanofibers using a centrifugal spinning process and decomposing at least a portion of the polymeric precursor fibers to form carbon fibers. The decomposition may be accomplished by treating the polymeric precursor fibers with acid vapor from an aqueous acid solution at a temperature of less than 250° C.
    Type: Application
    Filed: December 1, 2014
    Publication date: July 2, 2015
    Inventors: Karen Lozano, Lee Daniel Cremar
  • Publication number: 20150118565
    Abstract: A novel lithium battery cathode, a lithium ion battery using the same and processes and preparation thereof are disclosed. The battery cathode is formed by force spinning. Fiber spinning allows for the formation of core-shell materials using material chemistries that would be incompatible with prior spinning techniques. A fiber spinning apparatus for forming a coated fiber and a method of forming a coated fiber are also disclosed.
    Type: Application
    Filed: May 7, 2012
    Publication date: April 30, 2015
    Applicant: The Board of Regents, The University of Texas System
    Inventors: Nelson S. Bell, Nancy A. Missert, Karen Lozano, Yatinkumar N. Rane
  • Publication number: 20150061180
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Application
    Filed: June 2, 2014
    Publication date: March 5, 2015
    Applicant: The Board of Regents of The University of Texas System
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Patent number: 8828294
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: September 9, 2014
    Assignee: Board of Regents of the University of Texas System
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20140159263
    Abstract: Described herein are apparatuses and methods of creating fibers, such as microfibers and nanofibers. The methods discussed herein employ centrifugal forces to transform material into fibers. Apparatuses that may be used to create fibers are also described.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 12, 2014
    Inventors: Karen Lozano, Simon Padron, Javier Ortega
  • Publication number: 20140154493
    Abstract: A method of producing fibers, includes placing a composition that includes one or more fluoropolymers in the body of a fiber producing device and rotating the device at a speed sufficient to eject material from the fiber producing device to form fluoropolymer microfibers and/or nanofibers.
    Type: Application
    Filed: March 9, 2012
    Publication date: June 5, 2014
    Applicant: Board of Regents of the University of Texas System
    Inventors: Karen Lozano, Yatinkumar Rane, Nelson Bell
  • Patent number: 8721319
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: May 13, 2014
    Assignee: Board of Regents of the University to Texas System
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20130300012
    Abstract: Described herein are apparatuses and methods of creating fibers, such as microfibers and nanofibers. The methods discussed herein employ centrifugal forces to transform material into fibers. Apparatuses that may be used to create fibers are also described.
    Type: Application
    Filed: April 4, 2013
    Publication date: November 14, 2013
    Inventors: Simon Padron, Karen Lozano
  • Publication number: 20130001814
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Application
    Filed: June 19, 2012
    Publication date: January 3, 2013
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Patent number: 8231378
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: July 31, 2012
    Assignee: The Board of Regents of the University of Texas System
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20110229806
    Abstract: A method of fabricating a two-layer phase mask comprises subjecting a photoresist material to two overlapping laser beams that create light and dark fringes in the overlapping beam regions. The photoresist can comprise a liquid crystal and a photo-sensitive material, including, for example, a photo-sensitive monomer and/or polymer. The two laser beams can be first directed towards one side of the photoresist. In the areas subjected to lighter fringes, the polymer molecules can link together and force the liquid crystal into the areas subjected to the darker fringes. This can leave an alternating pattern of linear strips of polymer-rich and liquid crystal-rich regions. The exposure time can be limited so that the strips are formed only partially through the thickness of the photoresist. The photoresist can be then rotated 90 degrees and the overlapping laser beams directed towards the opposite side of the photoresist.
    Type: Application
    Filed: July 16, 2009
    Publication date: September 22, 2011
    Applicant: The Board of Regents of The University of Texas System
    Inventors: Yuankun Lin, Karen Lozano, Ahmad Harb, Daniel Rodriguez Ponce
  • Patent number: 7897248
    Abstract: A method of forming a composite of embedded nanofibers in a polymer matrix is disclosed. The method includes incorporating nanofibers in a plastic matrix forming agglomerates, and uniformly distributing the nanofibers by exposing the agglomerates to hydrodynamic stresses. The hydrodynamic said stresses force the agglomerates to break apart. In combination or additionally elongational flow is used to achieve small diameters and alignment. A nanofiber reinforced polymer composite system is disclosed. The system includes a plurality of nanofibers that are embedded in polymer matrices in micron size fibers. A method for producing nanotube continuous fibers is disclosed. Nanofibers are fibrils with diameters of 100 nm, multiwall nanotubes, single wall nanotubes and their various functionalized and derivatized forms. The method includes mixing a nanofiber in a polymer; and inducing an orientation of the nanofibers that enables the nanofibers to be used to enhance mechanical, thermal and electrical properties.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: March 1, 2011
    Assignee: William Marsh Rice University
    Inventors: Enrique V. Barrera, Fernando J. Rodriguez-Macias, Karen Lozano, Luis Paulo Felipe Chibante, David Harris Stewart
  • Publication number: 20090280207
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Application
    Filed: March 16, 2009
    Publication date: November 12, 2009
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20090280325
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Application
    Filed: March 16, 2009
    Publication date: November 12, 2009
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20090269429
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Application
    Filed: March 16, 2009
    Publication date: October 29, 2009
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20090232920
    Abstract: Apparatuses and methods for the production of superfine fibers.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 17, 2009
    Inventors: Karen Lozano, Kamalaksha Sarkar
  • Publication number: 20090104386
    Abstract: A method of forming a composite of embedded nanofibers in a polymer matrix is disclosed. The method includes incorporating nanofibers in a plastic matrix forming agglomerates, and uniformly distributing the nanofibers by exposing the agglomerates to hydrodynamic stresses. The hydrodynamic said stresses force the agglomerates to break apart. In combination or additionally elongational flow is used to achieve small diameters and alignment. A nanofiber reinforced polymer composite system is disclosed. The system includes a plurality of nanofibers that are embedded in polymer matrices in micron size fibers. A method for producing nanotube continuous fibers is disclosed. Nanofibers are fibrils with diameters 100 nm, multiwall nanotubes, single wall nanotubes and their various functionalized and derivatized forms. The method includes mixing a nanofiber in a polymer; and inducing an orientation of the nanofibers that enables the nanofibers to be used to enhance mechanical, thermal and electrical properties.
    Type: Application
    Filed: February 4, 2008
    Publication date: April 23, 2009
    Inventors: Enrique V. Barrera, Fernando J. Rodriguez-Macias, Karen Lozano, Luis Paulo Felipe Chibante, David Harris Stewart
  • Publication number: 20060047052
    Abstract: A method of forming a composite of embedded nanofibers in a polymer matrix is disclosed. The method includes incorporating nanofibers in a plastic matrix forming agglomerates, and uniformly distributing the nanofibers by exposing the agglomerates to hydrodynamic stresses. The hydrodynamic said stresses force the agglomerates to break apart. In combination or additionally elongational flow is used to achieve small diameters and alignment. A nanofiber reinforced polymer composite system is disclosed. The system includes a plurality of nanofibers that are embedded in polymer matrices in micron size fibers. A method for producing nanotube continuous fibers is disclosed. Nanofibers are fibrils with diameters 100 nm, multiwall nanotubes, single wall nanotubes and their various functionalized and derivatized forms. The method includes mixing a nanofiber in a polymer; and inducing an orientation of the nanofibers that enables the nanofibers to be used to enhance mechanical, thermal and electrical properties.
    Type: Application
    Filed: December 7, 2000
    Publication date: March 2, 2006
    Inventors: Enrique Barrera, Fernando Rodriguez-Macias, Karen Lozano, Luis Chibante, David Stewart