Patents by Inventor David S. Lashmore

David S. Lashmore 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: 20210104639
    Abstract: Solar cells fabricated from p-n junctions of boron nitride nanotubes alloyed with carbon are described. Band gaps of boron nitride carbon alloys are tailored by controlling carbon content in the boron nitride nanotubes. High efficiency solar cells can be fabricated by tailoring the band gap of boron nitride carbon alloy nanotubes, and using these nanotubes for fabricating solar cells u. Because boron nitride carbon alloy nanotubes are transparent to most wavelengths of light, the wavelengths not converted to electrons (i.e., absorbed) at a first p-n junction in a solar cell will pass through the stack to another p-n junction in the stack having a different band gap. At each successive p-n junction, each of which has a different band gap from the other p-n junctions in the stack, more wavelengths of light will be converted into electricity. This dramatically increases the efficiency of solar cells.
    Type: Application
    Filed: July 21, 2020
    Publication date: April 8, 2021
    Applicant: University of New Hampshire
    Inventor: David S. Lashmore
  • Publication number: 20200399748
    Abstract: A metal matrix composite comprising nanotubes; a method of producing the same; and a composition, for example a metal alloy, used in such composites and methods, are disclosed. A method for continuously infiltrating nanotube yarns, tapes or other nanotube preforms with metal alloys using a continuous process or a multistep process, which results in a metal matrix composite wire, cable, tape, sheet, tube, or other continuous shape, and the microstructure of these infiltrated yarns or fibers, are disclosed. The nanotube yarns comprise a multiplicity of spun nanotubes of carbon (CNT), boron nitride (BNNT), boron (BNT), or other types of nanotubes. The element that infiltrates the nanotube yarns or fibers can, for example, be alloyed with a concentration of one or more elements chosen such that the resulting alloy, in its molten state, will exhibit improved wetting of the nanotube material.
    Type: Application
    Filed: December 29, 2017
    Publication date: December 24, 2020
    Inventors: Pavel Bystricky, David S. Lashmore, Iva Kalus-Bystricky
  • Patent number: 10810868
    Abstract: Fiber emitters, such as carbon nanotube (CNT) yarns, are used to create infrared (IR) transmitters that can operate at high data rates, can shift spectral response, and can emit polarized light, for example by alignment of the fiber emitters in close proximity and in parallel directions. These fiber emitters can, for example, be used in patches that can be bonded to fabric or to an object, or can be woven into fabric during fabrication of a textile. The fiber emitters can be used in a variety of methods, including for friend or foe identification, communications, and identification of objects.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: October 20, 2020
    Assignee: American Boronite Corporation
    Inventors: David S. Lashmore, Pavel Bystricky, William Livernois, Brandon Wilson
  • Publication number: 20200262706
    Abstract: The present disclosure provides systems and methods for producing a volume of substantially all armchair nanotubes of a preselected chirality for fabricating yarn consisting of substantially all metallic conducting armchair tubes. The systems and methods can be used for the synthesis of (10,10), (11,11), and (12,12) metallic armchair carbon nanotubes and potentially other chiralities. The elements of the present disclosure include: (i) a carbon source that provides substantial numbers of ethylene and acetylene radicals in combination with a high population of ethylene groups and a small amount of methane, (ii) a hydrogen to carbon ratio sufficient to “passivate” all other chiral growth sites to a higher degree than armchair growth sites, and (iii) a CVD process that can be tuned to create a well-controlled population of catalyst with tight diameter distribution with sparse modal distribution that falls within a range of the desired single wall diameters.
    Type: Application
    Filed: February 19, 2020
    Publication date: August 20, 2020
    Inventors: David S. Lashmore, Pavel Bystricky, Susanthri Chandima Perera, Imre Tary, Vito M. Licata
  • Publication number: 20200255985
    Abstract: A method and apparatus for producing boron nitride nanotubes and continuous boron nitride nanotube yarn or tapes is provided. The apparatus includes rotating reaction tubes that allow for continuous chemical vapor deposition of boron nitride nanotubes. The rotation of the reaction tubes allows the boron nitride nanotubes to be spun into yarns or made into tapes, without post process or external rotation or spinning of the gathered nanotubes. Boron nitride nanotube yarns or tapes of great length can be produced as a result, thereby providing industry with a readily useable format for this type of material. Dopants such as carbon can be added to engineer the band gap of the nanotubes. Catalysts may be formed outside or inside the reactor.
    Type: Application
    Filed: October 29, 2019
    Publication date: August 13, 2020
    Applicant: University of New Hampshire
    Inventors: David S. Lashmore, Tyler Bennett
  • Patent number: 10720542
    Abstract: Solar cells fabricated from p-n junctions of boron nitride nanotubes alloyed with carbon are described. Band gaps of boron nitride carbon alloys are tailored by controlling carbon content in the boron nitride nanotubes. High efficiency solar cells can be fabricated by tailoring the band gap of boron nitride carbon alloy nanotubes, and using these nanotubes for fabricating solar cells u. Because boron nitride carbon alloy nanotubes are transparent to most wavelengths of light, the wavelengths not converted to electrons (i.e., absorbed) at a first p-n junction in a solar cell will pass through the stack to another p-n junction in the stack having a different band gap. At each successive p-n junction, each of which has a different band gap from the other p-n junctions in the stack, more wavelengths of light will be converted into electricity. This dramatically increases the efficiency of solar cells.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: July 21, 2020
    Assignee: University of New Hampshire
    Inventor: David S. Lashmore
  • Publication number: 20200139402
    Abstract: An apparatus having a conductive body defined by a plurality of nanotubes forming a planar structure. The apparatus further includes a plurality of junctions, formed by adjacent nanotubes, and a plurality of conductive deposits positioned at the junctions to electrically join the adjacent nanotubes at the junctions and reduce electrical resistance between the nanotubes, thereby increasing overall conductivity of the body.
    Type: Application
    Filed: December 16, 2019
    Publication date: May 7, 2020
    Inventors: David S. Lashmore, Paul Jarosz, Joe Johnson
  • Patent number: 10543509
    Abstract: An apparatus having a conductive body defined by a plurality of nanotubes forming a planar structure. The apparatus further includes a plurality of junctions, formed by adjacent nanotubes, and a plurality of conductive deposits positioned at the junctions to electrically join the adjacent nanotubes at the junctions and reduce electrical resistance between the nanotubes, thereby increasing overall conductivity of the body.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: January 28, 2020
    Assignee: Nanocomp Technologies, Inc.
    Inventors: David S. Lashmore, Paul Jarosz, Joseph E. Johnson
  • Publication number: 20200020224
    Abstract: Fiber emitters, such as carbon nanotube (CNT) yarns, are used to create infrared (IR) transmitters that can operate at high data rates, can shift spectral response, and can emit polarized light, for example by alignment of the fiber emitters in close proximity and in parallel directions. These fiber emitters can, for example, be used in patches that can be bonded to fabric or to an object, or can be woven into fabric during fabrication of a textile.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 16, 2020
    Inventors: David S. Lashmore, Pavel Bystricky, William Livernois, Brandon Wilson
  • Patent number: 10458049
    Abstract: A method and apparatus for producing boron nitride nanotubes and continuous boron nitride nanotube yarn or tapes is provided. The apparatus includes rotating reaction tubes that allow for continuous chemical vapor deposition of boron nitride nanotubes. The rotation of the reaction tubes allows the boron nitride nanotubes to be spun into yarns or made into tapes, without post process or external rotation or spinning of the gathered nanotubes. Boron nitride nanotube yarns or tapes of great length can be produced as a result, thereby providing industry with a readily useable format for this type of material. Dopants such as carbon can be added to engineer the band gap of the nanotubes. Catalysts may be formed outside or inside the reactor.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: October 29, 2019
    Assignee: University of New Hampshire
    Inventors: David S. Lashmore, Tyler Bennett
  • Publication number: 20190202187
    Abstract: A thermal protection material is provided. The material includes a non-woven nanotube sheet, a substrate material adjacent to the non-woven nanotube sheet, and an adhesive material positioned between the non-woven sheet and the substrate material. The thermal protection material can further include a coating that can enhance strength and oxidation protection. An apparatus for collecting the non-woven nanotube sheet and method for manufacturing the thermal protection material are also provided.
    Type: Application
    Filed: July 10, 2018
    Publication date: July 4, 2019
    Inventor: David S. Lashmore
  • Patent number: 10145627
    Abstract: A nanotube-based insulator is provided having thermal insulating properties. The insulator can include a plurality of nanotube sheets stacked on top of one another. Each nanotube sheet can be defined by a plurality of carbon nanotubes. The plurality of carbon nanotubes can be configured so as to decrease normal-to-plane thermal conductivity while permitting in-plane thermal conductivity. A plurality of spacers can be situated between adjacent nanotube sheets so as to reduce interlayer contact between the nanotubes in each sheet. The plurality of spacers can be ceramic or alumina dots or provided by texturing the nanotube sheets.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: December 4, 2018
    Assignee: NANOCOMP TECHNOLOGIES, INC.
    Inventors: David S. Lashmore, Diana Lewis
  • Publication number: 20180297319
    Abstract: A system that receives nanomaterials, forms nanofibrous materials therefrom, and collects these nanofibrous materials for subsequent applications. The system include a housing coupled to a synthesis chamber within which nanotubes are produced. A spindle may extend from within the housing, across the inlet, and into the chamber for collecting nanotubes and twisting them into a yarn. A body portion may be positioned at an intake end of the spindle. The body portion may include a pathway for imparting a twisting force onto the flow of nanotubes and guide them into the spindle for collection and twisting into the nanofibrous yarn. Methods and apparatuses for forming nanofibrous are also disclosed.
    Type: Application
    Filed: June 20, 2018
    Publication date: October 18, 2018
    Inventors: David S. Lashmore, Joseph J. Brown, Jared K. Chaffee, Bruce Resnicoff, Peter Antoinette
  • Publication number: 20180301579
    Abstract: Solar cells fabricated from p-n junctions of boron nitride nanotubes alloyed with carbon are described. Band gaps of boron nitride carbon alloys are tailored by controlling carbon content in the boron nitride nanotubes. High efficiency solar cells can be fabricated by tailoring the band gap of boron nitride carbon alloy nanotubes, and using these nanotubes for fabricating solar cells u. Because boron nitride carbon alloy nanotubes are transparent to most wavelengths of light, the wavelengths not converted to electrons (i.e., absorbed) at a first p-n junction in a solar cell will pass through the stack to another p-n junction in the stack having a different band gap. At each successive p-n junction, each of which has a different band gap from the other p-n junctions in the stack, more wavelengths of light will be converted into electricity. This dramatically increases the efficiency of solar cells.
    Type: Application
    Filed: May 3, 2018
    Publication date: October 18, 2018
    Applicant: University of New Hampshire
    Inventor: David S. Lashmore
  • Patent number: 10029442
    Abstract: A system that receives nanomaterials, forms nanofibrous materials therefrom, and collects these nanofibrous materials for subsequent applications. The system include a housing coupled to a synthesis chamber within which nanotubes are produced. A spindle may extend from within the housing, across the inlet, and into the chamber for collecting nanotubes and twisting them into a yarn. A body portion may be positioned at an intake end of the spindle. The body portion may include a pathway for imparting a twisting force onto the flow of nanotubes and guide them into the spindle for collection and twisting into the nanofibrous yarn. Methods and apparatuses for forming nanofibrous are also disclosed.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 24, 2018
    Assignee: NANOCOMP TECHNOLOGIES, INC.
    Inventors: David S. Lashmore, Joseph J. Brown, Jared K. Chaffee, Bruce Resnicoff, Peter Antoinette
  • Publication number: 20180056279
    Abstract: Techniques and methods are disclosed for producing a plurality of nanoparticles that can be used as catalysts to grow carbon or boron nitride nanotubes. The method includes mixing an iron salt including a ferrous or ferric ion with a long chain amine, thiol or polyphenol in a solvent comprising alcohol to produce a solution. Ferric or ferrous ion is reduced to zero valence iron. Nucleation of iron nanoparticles is initialized. The iron nanoparticles are capped to retard nanoparticle growth. The nanoparticles include an elemental iron core coated with a polyphenol that isolates the core from oxygen. The nanoparticles include an average diameter of less than or equal to 15.8 nanometers. The iron core may further include a secondary metal to form an iron-alloy. The secondary metal, in some applications, can be a transition metal.
    Type: Application
    Filed: September 1, 2017
    Publication date: March 1, 2018
    Applicant: University of New Hampshire
    Inventors: David S. Lashmore, Tyler Bennett
  • Publication number: 20160250823
    Abstract: A system that receives nanomaterials, forms nanofibrous materials therefrom, and collects these nanofibrous materials for subsequent applications. The system is coupled to a chamber that generates nanomaterials, typically carbon nanotubes produced from chemical vapor deposition, and includes a mechanism for spinning the nanotubes into yarns or tows. Alternatively, the system includes a mechanism for forming non-woven sheets from the nanotubes. The system also includes components for collecting the formed nanofibrous materials. Methods for forming and collecting the nanofibrous materials are also provided.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 1, 2016
    Inventors: David S. Lashmore, Joseph J. Brown, Jared K. Chaffee, Bruce Resnicoff, Peter Antoinette
  • Patent number: 9396829
    Abstract: A cable having a conducting member made from a nanostructure-based material, and a shielding layer made of nanostructure-based material. The shielding layer can be circumferentially situated about the conducting member so as to enhance conductivity along the conducting member. A coupling mechanism may be situated between the shielding layer and the conducting member so as to secure the shielding layer in its position on the conducting member. A method of making the cable is also disclosed.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: July 19, 2016
    Assignee: Nanocomp Technologies, Inc.
    Inventors: Jennifer Mann, David S. Lashmore, Brian White, Peter L. Antoinette
  • Publication number: 20160161196
    Abstract: A nanotube-based insulator is provided having thermal insulating properties. The insulator can include a plurality of nanotube sheets stacked on top of one another. Each nanotube sheet can be defined by a plurality of carbon nanotubes. The plurality of carbon nanotubes can be configured so as to decrease normal-to-plane thermal conductivity while permitting in-plane thermal conductivity. A plurality of spacers can be situated between adjacent nanotube sheets so as to reduce interlayer contact between the nanotubes in each sheet. The plurality of spacers can be ceramic or alumina dots or provided by texturing the nanotube sheets.
    Type: Application
    Filed: March 31, 2014
    Publication date: June 9, 2016
    Applicant: Nanocomp Technologies, Inc.
    Inventors: David S. Lashmore, Diana Lewis
  • Publication number: 20160086695
    Abstract: A conductive adapter for carrying relatively high current from a source to an external circuit without degradation is provided. The adapter includes a conducting member made from a conductive nanostructure-based material and having opposing ends. The adapter can also include a connector portion positioned on one end of the conducting member for maximizing a number of conductive nanostructures within the conducting member in contact with connector portion, so as to enable efficient conduction between a nanoscale environment and a traditional electrical and/or thermal circuit system. The adapter can further include a coupling mechanism situated between the conducting member and the connector portion, to provide a substantially uniform contact between the conductive nanostructure-based material in the conducting member and the connector portion. A method for making such a conductive adapter is also provided.
    Type: Application
    Filed: December 1, 2015
    Publication date: March 24, 2016
    Inventors: Jennifer Mann, David S. Lashmore, Brian White, Peter L. Antoinette