Patents by Inventor Elias Stefanakos

Elias Stefanakos 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).

  • Method and system for generating power from low- and mid- temperature heat sources using supercritical rankine cycles with zeotropic mixtures
    Patent number: 9376937
    Abstract: A method and system for generating power from low- and mid-temperature heat sources using a zeotropic mixture as a working fluid. The zeotropic mixture working fluid is compressed to pressures above critical and heated to a supercritical state. The zeotropic mixture working fluid is then expanded to extract power. The zeotropic mixture working fluid is then condensed, subcooled, and collected for recirculation and recompression.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: June 28, 2016
    Assignee: University of South Florida
    Inventors: D. Yogi Goswami, Huijuan Chen, Elias Stefanakos
  • METHOD AND SYSTEM FOR GENERATING POWER FROM LOW- AND MID- TEMPERATURE HEAT SOURCES
    Publication number: 20130213040
    Abstract: A method and system for generating power from low- and mid-temperature heat sources using a zeotropic mixture as a working fluid. The zeotropic mixture working fluid is compressed to pressures above critical and heated to a supercritical state. The zeotropic mixture working fluid is then expanded to extract power. The zeotropic mixture working fluid is then condensed, subcooled, and collected for recirculation and recompression.
    Type: Application
    Filed: August 22, 2012
    Publication date: August 22, 2013
    Applicant: UNIVERSITY OF SOUTH FLORIDA
    Inventors: D. Yogi Goswami, Huijuan Chen, Elias Stefanakos
  • Dual-polarized feed antenna apparatus and method of use
    Patent number: 7619570
    Abstract: An antenna apparatus and method for the interception of randomly polarized electromagnetic waves utilizing a dual polarized antenna which is excited through a cross-slot aperture using two well-isolated orthogonal feeds.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: November 17, 2009
    Assignee: University of South Florida
    Inventors: Mohammed Sarehraz, Kenneth A. Buckle, Elias Stefanakos, Thomas Weller, D. Yogi Goswami
  • High-frequency feed structure antenna apparatus and method of use
    Patent number: 7486236
    Abstract: An antenna apparatus for the reception of, and or transmission of, electromagnetic energy, the apparatus including a non-radiating dielectric waveguide aperture coupled to at least one dielectric rod antenna, which is electromagnetically coupled to a transmission line element.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: February 3, 2009
    Assignee: University of South Florida
    Inventors: Mohammad Sarehraz, Kenneth A. Buckle, Elias Stefanakos, Thomas Weller, D. Yogi Goswami
  • Dual-polarized feed antenna apparatus and method of use
    Patent number: 7362273
    Abstract: An antenna apparatus and method for the interception of randomly polarized electromagnetic waves utilizing a dual polarized antenna which is excited through a cross-slot aperture using two well-isolated orthogonal feeds.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: April 22, 2008
    Assignee: University of South Florida
    Inventors: Mohammad Sarehraz, Kenneth A. Buckle, Elias Stefanakos, Thomas Weller, D. Yogi Goswami
  • Dual-Polarized Feed Antenna Apparatus and Method of Use
    Publication number: 20070096990
    Abstract: An antenna apparatus and method for the interception of randomly polarized electromagnetic waves utilizing a dual polarized antenna which is excited through a cross-slot aperture using two well-isolated orthogonal feeds.
    Type: Application
    Filed: September 25, 2006
    Publication date: May 3, 2007
    Applicant: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Mohammed Sarehraz, Kenneth Buckle, Elias Stefanakos, Thomas Weller, D. Goswami
  • High-Frequency Feed Structure Antenna Apparatus and Method of Use
    Publication number: 20070069965
    Abstract: An antenna apparatus for the reception of, and or transmission of, electromagnetic energy, the apparatus including a non-radiating dielectric waveguide aperture coupled to at least one dielectric rod antenna, which is electromagnetically coupled to a transmission line element.
    Type: Application
    Filed: September 25, 2006
    Publication date: March 29, 2007
    Applicant: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Mohammed Sarehraz, Kenneth Buckle, Elias Stefanakos, Thomas Weller, D. Goswami
  • Rectifying antenna and method of manufacture
    Patent number: 7091918
    Abstract: In accordance with the present invention, an aperture rectenna is provided where the substrate is transparent and of sufficient mechanical strength to support the fabricated structure above it. An aperture antenna is deposited on the transparent substrate and a metal-insulator-metal (MIM) diode is constructed on top of the aperture antenna. There is an insulating layer between the aperture antenna metal and the metal ground plane optimized to maximize the collection of incident radiation. The top of the structure is capped with a metal ground plane layer, which also serves as the DC connection points for each rectenna element.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: August 15, 2006
    Assignee: University of South Florida
    Inventors: Shekhar Bhansali, Kenneth Buckle, D. Yogi Goswami, Elias Stefanakos, Thomas Weller