Patents by Inventor Harold T. Evensen

Harold T. Evensen 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: 10903034
    Abstract: A field emission transistor uses carbon nanotubes positioned to extend along a substrate plane rather than perpendicularly thereto. The carbon nanotubes may be pre-manufactured and applied to the substrate and then may be etched to create a gap between the carbon nanotubes and an anode through which electrons may flow by field emission. A planar gate may be positioned beneath the gap to provide a triode structure.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: January 26, 2021
    Assignee: WISYS TECHNOLOGY FOUNDATION, INC.
    Inventors: Charles D Nelson, Harold T Evensen
  • Publication number: 20190252146
    Abstract: A field emission transistor uses carbon nanotubes positioned to extend along a substrate plane rather than perpendicularly thereto. The carbon nanotubes may be pre-manufactured and applied to the substrate and then may be etched to create a gap between the carbon nanotubes and an anode through which electrons may flow by field emission. A planar gate may be positioned beneath the gap to provide a triode structure.
    Type: Application
    Filed: October 17, 2017
    Publication date: August 15, 2019
    Inventors: Charles D. Nelson, Harold T Evensen
  • Patent number: 10074819
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is spread over the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: September 11, 2018
    Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: Michael Scott Arnold, Padma Gopalan, Gerald Joseph Brady, Yongho Joo, Harold T. Evensen
  • Publication number: 20180013083
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is spread over the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Application
    Filed: August 1, 2017
    Publication date: January 11, 2018
    Inventors: Michael Scott Arnold, Padma Gopalan, Gerald Joseph Brady, Yongho Joo, Harold T. Evensen
  • Patent number: 9786853
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is spread over the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: October 10, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Michael Scott Arnold, Padma Gopalan, Gerald Joseph Brady, Yongho Joo, Harold T. Evensen
  • Patent number: 9673399
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is continuously supplied to the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: June 6, 2017
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Michael Scott Arnold, Harold T. Evensen, Gerald Joseph Brady, Padma Gopalan, Yongho Joo
  • Publication number: 20170012228
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is spread over the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Application
    Filed: February 11, 2015
    Publication date: January 12, 2017
    Inventors: Michael Scott Arnold, Padma Gopalan, Gerald Joseph Brady, Yongho Joo, Harold T. Evensen
  • Publication number: 20160308133
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is continuously supplied to the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Application
    Filed: June 29, 2016
    Publication date: October 20, 2016
    Inventors: Michael Scott Arnold, Harold T. Evensen, Gerald Joseph Brady, Padma Gopalan, Yongho Joo
  • Patent number: 9425405
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is continuously supplied to the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: August 23, 2016
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Michael Scott Arnold, Harold T. Evensen, Gerald Joseph Brady, Padma Gopalan, Yongho Joo
  • Publication number: 20160233426
    Abstract: High density films of semiconducting single-walled carbon nanotubes having a high degree of nanotube alignment are provided. Also provided are methods of making the films and field effect transistors (FETs) that incorporate the films as conducting channel materials. The single-walled carbon nanotubes are deposited from a thin layer of organic solvent containing solubilized single-walled carbon nanotubes that is continuously supplied to the surface of an aqueous medium, inducing evaporative self-assembly upon contacting a solid substrate.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 11, 2016
    Inventors: Michael Scott Arnold, Harold T. Evensen, Gerald Joseph Brady, Padma Gopalan, Yongho Joo
  • Patent number: 5890802
    Abstract: A device and method for mixing an aspirated fluid slug (40), such as a DNA sample and reagent, within a capillary tube (28) through the electrical deflection of a diaphragm, such as a piezo-ceramic disk (12). The device (10) includes first and second mounting plates (16, 18). The piezo-ceramic disk (12) is sandwiched between two O-rings seals (14) and the two mounting plates (16, 18) to form an air seal (21) between the disk (12) and the first mounting plate (16). A first opening (24) receives an end (26) of the capillary tube (28) and extends almost completely through the first mounting plate (16) such that the end (26) is essentially perpendicular and adjacent to the disk (12). A smaller axially-aligned second opening (30) connects the air seal (21) between the disk (12) and the first mounting plate (16) to dead air volume (42) in the capillary tube (28). A third O-ring seal (34) seals the capillary tube (28) to the first mounting plate (16) at the first opening (24).
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: April 6, 1999
    Assignee: University of Washington
    Inventors: Harold T. Evensen, David L. Cunningham