Patents by Inventor Elias K. Stefanakos

Elias K. 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).

  • Patent number: 12187961
    Abstract: Structures of a particle containing a core and at least one shell, a metal oxide material of which is necessarily doped to ensure protection of a material of the core from photodegradation. The core can include any of a thermochromic material, a phase-change material, and a judiciously defined auxiliary material that in turn contains organic and/or polymeric material. Derivative products utilizing a plurality of such particles. Methodologies for producing such particles and derivative products.
    Type: Grant
    Filed: November 6, 2023
    Date of Patent: January 7, 2025
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Elias K. Stefanakos, Sesha S. Srinivasan
  • Patent number: 11976241
    Abstract: A variety of particles forming microencapsulated thermochromic materials. The particles can include a thermochromic core and a metal oxide shell encapsulating the thermochromic core. The thermochromic core can include one or both of an organic thermochromic material and an inorganic salt thermochromic material. In some aspects, the particles include a dye selected from a crystal violet lactone dye, a fluoran dye, and a combination thereof. In still further aspects, the particles include a color developer selected from a hydroxybenzoate, a 4,4?-dihydroxydiphenyl propane, a hydroxycoumarin derivative, a lauryl gallate, and a combination thereof. In some aspects, the metal oxide shell is a TiO2 shell. The particles can be used in cements and paints and for a variety of building materials. Methods of making the particles and building materials and methods of use, for example, for removing a volatile organic carbon from a building material, are also provided.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: May 7, 2024
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos
  • Publication number: 20240069401
    Abstract: In one embodiment, an electrochromic device includes a single active layer configured to be alternately placed in a light-transmitting state in which relatively large amounts of light can be transmitted through the active layer and a light-blocking state in which relatively small amounts of light can be transmitted through the active layer, where the device comprises no other layers of material that contribute to transitioning between the two states
    Type: Application
    Filed: November 6, 2023
    Publication date: February 29, 2024
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos
  • Publication number: 20240067871
    Abstract: Structures of a particle containing a core and at least one shell, a metal oxide material of which is necessarily doped to ensure protection of a material of the core from photodegradation. The core can include any of a thermochromic material, a phase-change material, and a judiciously defined auxiliary material that in turn contains organic and/or polymeric material. Derivative products utilizing a plurality of such particles. Methodologies for producing such particles and derivative products.
    Type: Application
    Filed: November 6, 2023
    Publication date: February 29, 2024
    Inventors: Elias K. STEFANAKOS, Sesha S. SRINIVASAN
  • Patent number: 11851616
    Abstract: Structures of a particle containing a core and at least one shell, a metal oxide material of which is necessarily doped to ensure protection of a material of the core from photodegradation. The core can include any of a thermochromic material, a phase-change material, and a judiciously defined auxiliary material that in turn contains organic and/or polymeric material. Derivative products utilizing a plurality of such particles. Methodologies for producing such particles and derivative products.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: December 26, 2023
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Elias K. Stefanakos, Sesha S. Srinivasan
  • Publication number: 20230365849
    Abstract: In one embodiment, a phase change material is encapsulated by forming a phase change material pellet, coating the pellet with flexible material, heating the coated pellet to melt the phase change material, wherein the phase change materials expands and air within the pellet diffuses out through the flexible material, and cooling the coated pellet to solidify the phase change material.
    Type: Application
    Filed: July 11, 2023
    Publication date: November 16, 2023
    Inventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
  • Patent number: 11815779
    Abstract: In one embodiment, an electrochromic device includes a single active layer configured to be alternately placed in a light-transmitting state in which relatively large amounts of light can be transmitted through the active layer and a light-blocking state in which relatively small amounts of light can be transmitted through the active layer, wherein the device comprises no other layers of material that contribute to transitioning between the two states.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: November 14, 2023
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos
  • Patent number: 11732171
    Abstract: In one embodiment, a metal-plated polymer object includes a polymer surface, a first metal layer that has been applied to the polymer surface to render it electrically conductive, and a second metal layer that has been deposited on the first metal layer.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: August 22, 2023
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
  • Publication number: 20230220273
    Abstract: Structures of a particle containing a core and at least one shell, a metal oxide material of which is necessarily doped to ensure protection of a material of the core from photodegradation. The core can include any of a thermochromic material, a phase-change material, and a judiciously defined auxiliary material that in turn contains organic and/or polymeric material. Derivative products utilizing a plurality of such particles. Methodologies for producing such particles and derivative products.
    Type: Application
    Filed: February 11, 2022
    Publication date: July 13, 2023
    Inventors: Elias K. STEFANAKOS, Sesha S. SRINIVASAN
  • Publication number: 20230213831
    Abstract: The use of materially-asymmetric electrodes in an electro-chromic (EC) cell having a single active layer that employs a water-based gel electrolytic material solves a problem that is exhibited during operation of conventionally-structured devices and that is caused by electrolysis of water in the gel and formation of gas bubbles inside the conventionally-structured devices, thereby substantially increasing the number of operational cycles such devices can be subjected to.
    Type: Application
    Filed: August 9, 2021
    Publication date: July 6, 2023
    Inventors: Elias K. STEFANAKOS, Sharan Kumar INDRAKAR, Arash TAKSHI
  • Publication number: 20220315832
    Abstract: A variety of particles forming microencapsulated thermochromic materials. The particles can include a thermochromic core and a metal oxide shell encapsulating the thermochromic core. The thermochromic core can include one or both of an organic thermochromic material and an inorganic salt thermochromic material. In some aspects, the particles include a dye selected from a crystal violet lactone dye, a fluoran dye, and a combination thereof. In still further aspects, the particles include a color developer selected from a hydroxybenzoate, a 4,4?-dihydroxydiphenyl propane, a hydroxycoumarin derivative, a lauryl gallate, and a combination thereof. In some aspects, the metal oxide shell is a TiO2 shell. The particles can be used in cements and paints and for a variety of building materials. Methods of making the particles and building materials and methods of use, for example, for removing a volatile organic carbon from a building material, are also provided.
    Type: Application
    Filed: June 13, 2022
    Publication date: October 6, 2022
    Applicant: University of South Florida
    Inventors: Manoj Kumar RAM, Elias K. STEFANAKOS
  • Publication number: 20220308417
    Abstract: In one embodiment, an electrochromic device includes a single active layer configured to be alternately placed in a light-transmitting state in which relatively large amounts of light can be transmitted through the active layer and a light-blocking state in which relatively small amounts of light can be transmitted through the active layer, wherein the device comprises no other layers of material that contribute to transitioning between the two states
    Type: Application
    Filed: June 13, 2022
    Publication date: September 29, 2022
    Applicant: University of South Florida
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos
  • Patent number: 11401426
    Abstract: In one embodiment, a flexible composite conducting polymer film includes a composite conducting polymer including a conducting polymer and one or more water-soluble polyanions, wherein the film is approximately 20 nanometers to 10 microns thick.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: August 2, 2022
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos, Yogi D. Goswami
  • Patent number: 11359137
    Abstract: A variety of particles forming microencapsulated thermochromic materials are provided. The particles can include a thermochromic core and a metal oxide shell encapsulating the thermochromic core. The thermochromic core can include one or both of an organic thermochromic material and an inorganic salt thermochromic material. In some aspects, the particles include a dye selected from a crystal violet lactone dye, a fluoran dye, and a combination thereof. In still further aspects, the particles include a color developer selected from a hydroxybenzoate, a 4, 4?-dihydroxydiphenyl propane, a hydroxycoumarin derivative, a lauryl gallate, and a combination thereof. In some aspects, the metal oxide shell is a TiO2 shell. The particles can be used in cements and paints and for a variety of building materials. Methods of making the particles and building materials and methods of use, for example, for removing a volatile organic carbon from a building material, are also provided.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: June 14, 2022
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos
  • Patent number: 11360366
    Abstract: In one embodiment, an electrochromic device includes a single active layer configured to be alternately placed in a light-transmitting state in which relatively large amounts of light can be transmitted through the active layer and a light-blocking state in which relatively small amounts of light can be transmitted through the active layer, wherein the device comprises no other layers of material that contribute to transitioning between the two states.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: June 14, 2022
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos
  • Patent number: 11079649
    Abstract: The subject invention pertains to color changeable, film materials comprising a metal substrate layer; a conducting polymer or conducting polymer composite layer; and an electrolyte layer. The conducting polymer or conducting polymer composite layer of the film material is capable of exhibiting changes in one or more optical properties when the film material is in contact with a metal. The subject invention also pertains to methods of preparing conducting polymer films capable of exhibiting changes in optical properties.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: August 3, 2021
    Assignees: UNIVERSITY OF SOUTH FLORIDA, UNITED STATES DEPARTMENT OF ENERGY
    Inventors: Manoj Kumar Ram, D. Yogi Goswami, Elias K. Stefanakos
  • Patent number: 10864294
    Abstract: Photocatalysis is a promising technique for remediation of indoor air pollution. The present invention focuses on the enhancement of the effectiveness of the photocatalytic process by the introduction of artificial roughness on the interior reactor surface. Artificial roughness elements on the catalytic surface enhance the turbulence intensity close to the catalytic surface. The enhanced turbulence intensity translates to an increase in the mass transfer of airborne contaminants to the catalyst surface, improving the efficiency of photocatalysis.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: December 15, 2020
    Assignee: University of South Florida
    Inventors: Dharendra Yogi Goswami, Elias K. Stefanakos, Yangyang Zhang
  • Patent number: 10854352
    Abstract: In one embodiment, a method for forming a conducting film includes depositing a base layer of a conducting polymer on a substrate, the polymer forming only a weak bond with the substrate, depositing a top layer of a conducting material on the base layer, applying adhesive tape to the top layer, and peeling the tape off of the substrate, removing the top layer along with the tape.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: December 1, 2020
    Assignee: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos, Dharendra Yogi Goswami
  • Patent number: 10690121
    Abstract: In one embodiment, a thermodynamic system includes multiple types of thermodynamic cycles and multiple types of solar thermal fields that provide thermal energy to the thermodynamic cycles.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: June 23, 2020
    Assignee: University of South Florida
    Inventors: Dharendra Yogi Goswami, Elias K. Stefanakos, Nitin Goel
  • Publication number: 20200192174
    Abstract: In one embodiment, an electrochromic device includes a single active layer configured to be alternately placed in a light-transmitting state in which relatively large amounts of light can be transmitted through the active layer and a light-blocking state in which relatively small amounts of light can be transmitted through the active layer, wherein the device comprises no other layers of material that contribute to transitioning between the two states.
    Type: Application
    Filed: May 16, 2018
    Publication date: June 18, 2020
    Applicant: University of South Florida
    Inventors: Manoj Kumar Ram, Elias K. Stefanakos