Patents by Inventor Jonathan W. Ward

Jonathan W. Ward 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).

  • Patent number: 10343304
    Abstract: Polymer composites containing carbon nanotubes often exhibit high glass transition temperatures, which can complicate their use in additive manufacturing processes. Extruded filaments containing carbon nanotubes and residual solvent can have desirably lowered glass transition temperatures. Extruded filaments can contain a polymer as a continuous phase, a nanomaterial such as carbon nanotubes homogeneously mixed throughout the continuous phase, and above 0% to about 15% solvent by weight.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: July 9, 2019
    Assignee: Lockheed Martin Corporation
    Inventors: Aaron G. Sell, Jonathan W. Ward
  • Patent number: 10066883
    Abstract: Compressed carbon nanotube aerogel materials can be used in heat management and thermal shielding applications. Methods for heat management and thermal shielding of an object can include placing a compressed carbon nanotube aerogel material between an object and its surrounding environment, and establishing a thermal gradient within the compressed carbon nanotube aerogel material by exposing the compressed carbon nanotube aerogel material to the object or to the surrounding environment. When the object and the surrounding environment are in thermal communication with one another, the compressed carbon nanotube aerogel material can reduce an amount of heat transferred between the object and the surrounding environment. As a result of establishing the thermal gradient within the compressed carbon nanotube aerogel material, an electric current may be generated in some instances.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: September 4, 2018
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Jonathan W. Ward, James M. Spatcher
  • Patent number: 9911743
    Abstract: Under one aspect, a method of making a nanotube switch includes: providing a substrate having a first conductive terminal; depositing a multilayer nanotube fabric over the first conductive terminal; and depositing a second conductive terminal over the multilayer nanotube fabric, the nanotube fabric having a thickness, density, and composition selected to prevent direct physical and electrical contact between the first and second conductive terminals. In some embodiments, the first and second conductive terminals and the multilayer nanotube fabric are lithographically patterned so as to each have substantially the same lateral dimensions, e.g., to each have a substantially circular or rectangular lateral shape. In some embodiments, the multilayer nanotube fabric has a thickness from 10 nm to 200 nm, e.g., 10 nm to 50 nm. The structure may include an addressable diode provided under the first conductive terminal or deposited over the second terminal.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: March 6, 2018
    Assignee: Nantero, Inc.
    Inventors: Claude L. Bertin, Thomas Rueckes, X. M. Henry Huang, Ramesh Sivarajan, Eliodor G. Ghenciu, Steven L. Konsek, Mitchell Meinhold, Jonathan W. Ward, Darren K. Brock
  • Patent number: 9581282
    Abstract: Compressed carbon nanotube aerogel materials can be used in heat management and thermal shielding applications. Methods for heat management and thermal shielding of an object can include placing a compressed carbon nanotube aerogel material between an object and its surrounding environment, and establishing a thermal gradient within the compressed carbon nanotube aerogel material by exposing the compressed carbon nanotube aerogel material to the object or to the surrounding environment. When the object and the surrounding environment are in thermal communication with one another, the compressed carbon nanotube aerogel material can reduce an amount of heat transferred between the object and the surrounding environment. As a result of establishing the thermal gradient within the compressed carbon nanotube aerogel material, an electric current may be generated in some instances.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: February 28, 2017
    Assignee: Lockheed Martin Corporation
    Inventors: Jonathan W. Ward, James M. Spatcher
  • Patent number: 9360589
    Abstract: Identifying marks are often used for authentication and tracking purposes with various types of articles, but the marks themselves can sometimes be subject to replication or removal by an outside entity, such as a person or group having malicious intent. This can make it easier for an outside entity to produce a counterfeit article or to sell a stolen article. Carbon nanotubes and other carbon nanomaterials can be used to form identifying marks that are not visible to the naked eye, thereby making the marks more difficult for an outside entity to tamper with. Various articles can include an identifying mark that is localized and not visible to the naked eye, the identifying mark being electrically conductive and containing a carbon nanomaterial. By electrically interrogating the article, such as through spatially measuring eddy currents about the article, the marks can be located and authenticated.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: June 7, 2016
    Assignee: Lockheed Martin Corporation
    Inventors: Mitchell W. Meinhold, Jonathan W. Ward, Michael J. O'Connor
  • Patent number: 9179542
    Abstract: Identifying marks are often used for authentication and tracking purposes with various types of articles, but they can sometimes be subject to replication or removal by an outside entity, such as a person or group having malicious intent. Carbon nanotubes and other carbon nanomaterials can be used to form identifying marks that are not visible to the naked eye, thereby making the marks more difficult for an outside entity to tamper with. Various articles can include an identifying mark that is not visible to the naked eye, the identifying mark containing a nanomaterial that includes a plurality of carbon nanotubes with a registered distribution of chiralities. The registered distribution of chiralities can be further tailored to increase the level of security provided by the mark.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: November 3, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Michael S. Beck, Hilary S. Lackritz, Jonathan W. Ward
  • Patent number: 9159418
    Abstract: A three-dimensional (3-D) memory stack and a method of formation thereof are described. The 3-D memory stack includes a number of vertically stacked memory devices. Each memory device includes one or more memory cells. Each of the memory cells can be formed on a conductive material. Each memory device further includes one or more selector elements each configured to couple a memory cell of the one or more memory cells to a respective bit line. None of the selector elements is configured as a diode or a transistor element.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: October 13, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Jonathan W. Ward, Adrian N. Robinson, Garo J. Derderian
  • Patent number: 9082613
    Abstract: Methods for fabricating graphene nanoelectronic devices with semiconductor compatible processes, which allow wafer scale fabrication of graphene nanoelectronic devices, is provided. One method includes the steps of preparing a dispersion of functionalized graphene in a solvent; and applying a coating of said dispersion onto a substrate and evaporating the solvent to form a layer of functionalized graphene; and defunctionalizing the graphene to form a graphene layer on the substrate.
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: July 14, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Jonathan W. Ward, Michael J. O'Connor
  • Patent number: 8937575
    Abstract: A nanotube based microstrip antenna element is provided along with arrays of same. The nanotube based microstrip antenna element comprises a dielectric substrate layer sandwiched between a ground plane layer and a conductive nanotube layer, the conductive nanotube layer shaped to form a radiating structure. In more advanced embodiments, the nanotube based microstrip antenna element further includes an integrated two terminal nanotube switch device such as to provide a selectability function to such microstrip antenna elements and reconfigurable arrays of same. Anisotropic nanotube fabric layers are also used to provide substantially transparent microstrip antenna structures which can be deposited over display screens and the like.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: January 20, 2015
    Assignee: Nantero Inc.
    Inventors: Jonathan W. Ward, Robert F. Smith, Brent M. Segal
  • Publication number: 20140312248
    Abstract: Identifying marks are often used for authentication and tracking purposes with various types of articles, but they can sometimes be subject to replication or removal by an outside entity, such as a person or group having malicious intent. Carbon nanotubes and other carbon nanomaterials can be used to form identifying marks that are not visible to the naked eye, thereby making the marks more difficult for an outside entity to tamper with. Various articles can include an identifying mark that is not visible to the naked eye, the identifying mark containing a nanomaterial that includes a plurality of carbon nanotubes with a registered distribution of chiralities. The registered distribution of chiralities can be further tailored to increase the level of security provided by the mark.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventors: Michael S. BECK, Hilary S. LACKRITZ, Jonathan W. WARD
  • Publication number: 20140248533
    Abstract: Conventional rechargeable batteries, such as lithium-ion batteries, are somewhat limited in their energy storage density. Sulfur-based batteries can provide improved energy storage density, but their use can be hampered by sulfur's low electrical conductivity. Energy storage devices, particularly batteries, can have a first electrode that includes a carbon nanotube aerogel, and an electroactive material containing sulfur that is incorporated in the carbon nanotube aerogel. Methods for forming an energy storage device can include incorporating an electroactive material containing sulfur in a carbon nanotube aerogel, compressing the carbon nanotube aerogel to form a compressed carbon nanotube aerogel, and disposing a first electrode containing the compressed carbon nanotube aerogel and the electroactive material in an electrolyte with a second electrode and a plurality of lithium ions, such that a separator material permeable to the lithium ions is between the first electrode and the second electrode.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 4, 2014
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventors: Justin Samuel GOLIGHTLY, Mark Joseph ISAACSON, Jonathan W. WARD
  • Patent number: 8822352
    Abstract: Metal nitride coatings containing carbon can be either electrically conductive or substantially non-conductive depending on the degree to which they have been exposed to an oxidative environment. Substantially non-conductive metal nitride coatings can be used as protective layers in electrical devices. Particularly in an electrical device containing carbon nanomaterials, the metal nitride coatings can be used to mask the device's operational characteristics. Such devices can contain an electrical interconnect containing a carbon nanomaterial and a substantially non-conductive coating on the carbon nanomaterial. The substantially non-conductive coating can contain at least one substantially non-conductive metal nitride layer and at least some carbon. Methods for making such devices and metal nitride coatings are also described herein.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: September 2, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Garo J. Derderian, Jonathan W. Ward
  • Patent number: 8816706
    Abstract: Methods for using carbon nanomaterials to alter the operational output of a device are described herein. The methods can include providing a device that contains a carbon nanomaterial in a first state, and applying an input stimulus to the carbon nanomaterial so as to change the first state into a second state. In the first state, the carbon nanomaterial can be used to produce a normal operational output of the device, whereas the device can produce an altered operational output when the carbon nanomaterial is in the second state. When producing an altered operational output, the device can continue operating, but the altered operational output can be non-indicative of the true operational state of the device. Devices containing a carbon nanomaterial that can be reconfigured from a normal operational output to an altered operational output are also described herein.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: August 26, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Jonathan W. Ward, Brent M. Segal, Elwood J. Egerton
  • Patent number: 8771628
    Abstract: Certain applicator liquids and method of making the applicator liquids are described. The applicator liquids can be used to form nanotube films or fabrics of controlled properties. An applicator liquid for preparation of a nanotube film or fabric includes a controlled concentration of nanotubes dispersed in a liquid medium containing water. The controlled concentration is sufficient to form a nanotube fabric or film of preselected density and uniformity.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: July 8, 2014
    Assignee: Nantero Inc.
    Inventors: Ramesh Sivarajan, Thomas Rueckes, Rahul Sen, Brent M. Segal, Eliodor G. Ghenciu, Jonathan W. Ward, Tzong-Ru T. Han
  • Patent number: 8631562
    Abstract: An electrostatic discharge (ESD) protection circuit for protecting a protected circuit is coupled to an input pad. The ESD circuit includes a nanotube switch electrically having a control. The switch is coupled to the protected circuit and to a discharge path. The nanotube switch is controllable, in response to electrical stimulation of the control, between a de-activated state and an activated state. The activated state creates a current path so that a signal on the input pad flows to the discharge path to cause the signal at the input pad to remain within a predefined operable range for the protected circuit. The nanotube switch, the input pad, and the protected circuit may be on a semiconductor chip. The nanotube switch may be on a chip carrier. The deactivated and activated states may be volatile or non-volatile depending on the embodiment.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: January 21, 2014
    Assignee: Nantero Inc.
    Inventors: Claude L. Bertin, Brent M. Segal, Thomas Rueckes, Jonathan W. Ward
  • Patent number: 8630091
    Abstract: Under one aspect, a method of cooling a circuit element includes providing a thermal reservoir having a temperature lower than an operating temperature of the circuit element; and providing a nanotube article in thermal contact with the circuit element and with the reservoir, the nanotube article including a non-woven fabric of nanotubes in contact with other nanotubes to define a plurality of thermal pathways along the article, the nanotube article having a nanotube density and a shape selected such that the nanotube article is capable of transferring heat from the circuit element to the thermal reservoir.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: January 14, 2014
    Assignee: Nantero Inc.
    Inventors: Jonathan W. Ward, Claude L. Bertin, Brent M. Segal
  • Patent number: 8618662
    Abstract: Metal nitride coatings containing carbon can be either electrically conductive or substantially non-conductive depending on the degree to which they have been exposed to an oxidative environment. Substantially non-conductive metal nitride coatings can be used as protective layers in electrical devices. Particularly in an electrical device containing carbon nanomaterials, the metal nitride coatings can be used to mask the device's operational characteristics. Such devices can contain an electrical interconnect containing a carbon nanomaterial and a substantially non-conductive coating on the carbon nanomaterial. The substantially non-conductive coating can contain at least one substantially non-conductive metal nitride layer and at least some carbon. Methods for making such devices and metal nitride coatings are also described herein.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: December 31, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Garo J. Derderian, Jonathan W. Ward
  • Patent number: 8604459
    Abstract: Electrical devices containing carbon nanotubes can be passivated to protect the carbon nanotubes from degradation while substantially preserving the carbon nanotubes' electrical conductivity and switching characteristics. Such electrical devices can include a first metal contact, a switching layer containing a plurality of carbon nanotubes disposed on the first metal contact, a passivation layer containing amorphous carbon, a metal carbide, or any combination thereof that is disposed on at least a top surface of the switching layer, and a second metal contact disposed upon the passivation layer. Methods for forming the electrical devices can include disposing a passivation layer containing amorphous carbon on at least a top surface of the switching layer, and optionally heating to at least partially convert the amorphous carbon within the passivation layer into a metal carbide.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: December 10, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Jonathan W. Ward, Garo J. Derderian
  • Patent number: 8587989
    Abstract: NRAM arrays with nanotube blocks, traces and planes, and methods of making the same are disclosed. In some embodiments, a nanotube memory array includes a nanotube fabric layer disposed in electrical communication with first and second conductor layers. A memory operation circuit including a circuit for generating and applying a select signal on first and second conductor layers to induce a change in the resistance of the nanotube fabric layer between the first and second conductor layers is provided. At least two adjacent memory cells are formed in at least two selected cross sections of the nanotube fabric and conductor layers such that each memory cell is uniquely addressable and programmable. For each cell, a change in resistance corresponds to a change in an informational state of the memory cell. Some embodiments include bit lines, word lines, and reference lines. In some embodiments, 6F2 memory cell density is achieved.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: November 19, 2013
    Assignee: Nantero Inc.
    Inventors: H. Montgomery Manning, Thomas Rueckes, Claude L. Bertin, Jonathan W. Ward, Garo Derderian
  • Patent number: 8525143
    Abstract: Methods and systems of using nanotube elements as joule heating elements for memories and other applications. Under one aspect, a method includes providing an electrical stimulus, regulated by a drive circuit, through a nanotube element in order to heat an adjacent article. Further, a detection circuit electrically gauges the state of the article. The article heated by the nanotube element is, in preferred embodiments, a phase changing material, hi memory applications, the invention may be used as a small-scale CRAM capable of employing small amounts of current to induce rapid, large temperature changes in a chalcogenide material. Under various embodiments of the disclosed invention, the nanotube element is composed of a non-woven nanotube fabric which is either suspended from supports and positioned adjacent to the phase change material or is disposed on a substrate and in direct contact with the phase change material.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: September 3, 2013
    Assignee: Nantero Inc.
    Inventors: Jonathan W. Ward, Thomas Rueckes, Mitchell Meinhold, Brent M. Segal