Patents by Inventor Steven Trigwell

Steven Trigwell 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: 9982661
    Abstract: A thermal management system includes a first substrate having a first conductive inner surface. A second substrate has a second conductive inner surface. A connecting structure is attached to the first and second substrates to space apart the first and second inner surfaces defining an insulating space for a single architecture. One or more passively-acting elements are attached to the inner surface of at least one substrate and including a shape memory material such as a shape memory alloy (SMA). The SMA passively reacts to the temperature of the first substrate by thermally contacting or separating from the second inner surface of the second substrate for the control of the conduction of heat energy in either direction.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: May 29, 2018
    Assignee: The United States of America as Represented by the Administrator of NASA
    Inventors: Steven Trigwell, James E. Fesmire, Tracy L. Gibson, Martha K. Williams
  • Patent number: 9068283
    Abstract: In one aspect, the present invention relates to a layered structure usable in a strain sensor. In one embodiment, the layered structure has a substrate with a first surface and an opposite, second surface defining a body portion therebetween; and a film of carbon nanotubes deposited on the first surface of the substrate, wherein the film of carbon nanotubes is conductive and characterized with an electrical resistance. In one embodiment, the carbon nanotubes are aligned in a preferential direction. In one embodiment, the carbon nanotubes are formed in a yarn such that any mechanical stress increases their electrical response. In one embodiment, the carbon nanotubes are incorporated into a polymeric scaffold that is attached to the surface of the substrate. In one embodiment, the surfaces of the carbon nanotubes are functionalized such that its electrical conductivity is increased.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: June 30, 2015
    Assignee: BOARD OF TRUSTEES OF THE UNIVERSITY OF ARKANSAS
    Inventors: Alexandru S. Biris, Steven Trigwell, Walter Hatfield
  • Publication number: 20130298399
    Abstract: A method of making an electrodynamic array of conductive nanomaterial electrodes calls for a liquid solution containing nanomaterials to be deposited as an array of conductive electrodes on a substrate, including rigid or flexible substrates such as fabrics, and opaque or transparent substrates. The nanomaterial electrodes may also be grown in situ. The nanomaterials may include carbon nanomaterials, other organic or inorganic nanomaterials or mixtures.
    Type: Application
    Filed: July 22, 2013
    Publication date: November 14, 2013
    Inventors: Steven Trigwell, Alexandru S. Biris, Carlos I. Calle
  • Patent number: 8513531
    Abstract: An electrodynamic array of conductive nanomaterial electrodes and a method of making such an electrodynamic array. In one embodiment, a liquid solution containing nanomaterials is deposited as an array of conductive electrodes on a substrate, including rigid or flexible substrates such as fabrics, and opaque or transparent substrates. The nanomaterial electrodes may also be grown in situ. The nanomaterials may include carbon nanomaterials, other organic or inorganic nanomaterials or mixtures.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: August 20, 2013
    Assignee: The Board of Trustees of the University of Arkansas
    Inventors: Steven Trigwell, Alexandru S. Biris, Carlos I. Calle
  • Publication number: 20110011629
    Abstract: An electrodynamic array of conductive nanomaterial electrodes and a method of making such an electrodynamic array. In one embodiment, a liquid solution containing nanomaterials is deposited as an array of conductive electrodes on a substrate, including rigid or flexible substrates such as fabrics, and opaque or transparent substrates. The nanomaterial electrodes may also be grown in situ. The nanomaterials may include carbon nanomaterials, other organic or inorganic nanomaterials or mixtures.
    Type: Application
    Filed: July 15, 2010
    Publication date: January 20, 2011
    Inventors: Steven Trigwell, Alexandru S. Biris, Carlos I. Calle
  • Patent number: 7311727
    Abstract: An encased stent that discourages restenosis by having a homogenous endothelial cell lining along the inner wall of the stent. The endothelial cell lining may be coated on the stent before the stent is placed in the artery, or the endothelial cell lining may be grown after placement by several factors that encourage such growth and discourage restenosis. The endothelial cells to coat the stent may be genetically modified to enhance the growth of the endothelial cells into a homogeneous lining. The stent has a continuous lining in the form of a multi-layer polymer coating, including a conducting biocorrosion inhibiting layer and a continuous film of polyurethane coupled by a coupling agent to polyethylene glycol. Various drugs and cell factors may be incorporated into the lining, such as anti-thrombin, anti-inflammatory and anti-coagulant drugs, cell cycle inhibitors, and vascular endothelial growth factors.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: December 25, 2007
    Assignee: Board of Trustees of the University of Arkansas
    Inventors: Mark M. Mazumder, Jawahar L. Mehta, Malay K. Mazumder, Nawab Ali, Steven Trigwell, Rajesh Sharma, Samiran De
  • Publication number: 20040225346
    Abstract: An encased stent that discourages restenosis by having a homogenous endothelial cell lining along the inner wall of the stent. The endothelial cell lining may be coated on the stent before the stent is placed in the artery, or the endothelial cell lining may be grown after placement by several factors that encourage such growth and discourage restenosis. The endothelial cells to coat the stent may be genetically modified to enhance the growth of the endothelial cells into a homogeneous lining. The stent has a continuous lining in the form of a multi-layer polymer coating, including a conducting biocorrosion inhibiting layer and a continuous film of polyurethane coupled by a coupling agent to polyethylene glycol. Various drugs and cell factors may be incorporated into the lining, such as anti-thrombin, anti-inflammatory and anti-coagulant drugs, cell cycle inhibitors, and vascular endothelial growth factors.
    Type: Application
    Filed: February 4, 2004
    Publication date: November 11, 2004
    Inventors: Mark M. Mazumder, Jawahar L. Mehta, Malay K. Mazumder, Nawab Ali, Steven Trigwell, Rajesh Sharma, Samiran De