Patents by Inventor Thomas F. Guarr

Thomas F. Guarr 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: 11545691
    Abstract: A redox flow battery includes a cathode, an anode, a charge-carrying electrolyte, and an (a) oxidized and a (b) reduced form of an active material. The active material has the following formula: (D)-(L)-(A)-[(L)-(A)]V-DZ(F1) or (D)-(L)-(A)-(L-D)X (F2). In these formulae, each D is covalently bonded to an L, each L is covalently bonded to an A, x is a number from 0 to 5, v is a number from 0 to 5 and z is 0 or 1. D is an electron donor compound, L is a linker, and A is an electron acceptor compound. Each of D, L, and A has a particular structure.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: January 3, 2023
    Assignee: Board of Trustees of Michigan State University
    Inventor: Thomas F. Guarr
  • Patent number: 11177513
    Abstract: A rechargeable lithium-ion cell has a cell capacity and includes a positive electrode having a recharged potential and a negative electrode. The rechargeable lithium-ion cell also includes a charge-carrying electrolyte. The charge-carrying electrolyte includes a charge-carrying medium and a lithium salt. The rechargeable lithium-ion cell also includes a redox shuttle having the following structure Formula (I).
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: November 16, 2021
    Assignee: Board of Trustees of Michigan State University
    Inventors: Thomas F. Guarr, Matthew M. Gregory, Nicholas Robert Boersma, Robert Andrew Polik, Nicholas Mortimer
  • Patent number: 11094964
    Abstract: A rechargeable electrochemical cell includes a positive electrode having a recharged potential, a negative electrode, and a charge-carrying electrolyte. The rechargeable electrochemical cell further includes an active material having the following structure.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: August 17, 2021
    Assignee: Board of Trustees of Michigan State University
    Inventors: Thomas F. Guarr, Daniel R. Henton, Amber Prins, Adina Dumitrascu
  • Publication number: 20200136165
    Abstract: A redox flow battery includes a cathode, an anode, a charge-carrying electrolyte, and an (a) oxidized and a (b) reduced form of an active material. The active material has the following formula: (D)-(L)-(A)-[(L)-(A)]V-DZ(F1) or (D)-(L)-(A)-(L-D)X (F2). In these formulae, each D is covalently bonded to an L, each L is covalently bonded to an A, x is a number from 0 to 5, v is a number from 0 to 5 and z is 0 or 1. D is an electron donor compound, L is a linker, and A is an electron acceptor compound. Each of D, L, and A has a particular structure.
    Type: Application
    Filed: July 20, 2018
    Publication date: April 30, 2020
    Applicant: Board of Trustees of Michigan State University
    Inventor: Thomas F. Guarr
  • Publication number: 20190372163
    Abstract: A rechargeable electrochemical cell includes a positive electrode having a recharged potential, a negative electrode, and a charge-carrying electrolyte. The rechargeable electrochemical cell further includes an active material having the following structure.
    Type: Application
    Filed: November 21, 2017
    Publication date: December 5, 2019
    Inventors: Thomas F. Guarr, Daniel R. Henton, Amber Prins, Adina Dumitrascu
  • Publication number: 20190305381
    Abstract: A rechargeable lithium-ion cell has a cell capacity and includes a positive electrode having a recharged potential and a negative electrode. the rechargeable lithium-ion cell also includes a charge-carrying electrolyte. The charge-carrying electrolyte includes a charge-carrying medium and a lithium salt.
    Type: Application
    Filed: February 6, 2019
    Publication date: October 3, 2019
    Inventors: Thomas F. Guarr, Matthew M. Gregory, Nicholas Robert Boersma, Robert Andrew Polik, Nicholas Mortimer
  • Patent number: 10249910
    Abstract: A rechargeable lithium-ion cell has a cell capacity and includes a positive electrode having a recharged potential and a negative electrode. The rechargeable lithium-ion cell also includes a charge-carrying electrolyte. The charge-carrying electrolyte includes a charge-carrying medium and a lithium salt. The rechargeable lithium-ion cell also includes a redox shuttle having the following structure.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: April 2, 2019
    Assignee: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
    Inventors: Thomas F. Guarr, Mathew M. Gregory, Nicholas Robert Boersma, Robert Andrew Polik, Nicholas Mortimer
  • Patent number: 9709869
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: July 18, 2017
    Assignee: GENTEX CORPORATION
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman, John S. Anderson
  • Publication number: 20170162916
    Abstract: A rechargeable lithium-ion cell has a cell capacity and includes a positive electrode having a recharged potential and a negative electrode. The rechargeable lithium-ion cell also includes a charge-carrying electrolyte. The charge-carrying electrolyte includes a charge-carrying medium and a lithium salt. The rechargeable lithium-ion cell also includes a redox shuttle having the following structure.
    Type: Application
    Filed: July 17, 2015
    Publication date: June 8, 2017
    Applicant: Board of Trustees of Michigan State University
    Inventors: Thomas F. Guarr, Matthew M. Gregory, Nicholas Robert Boersma, Robert Andrew Polik, Nicholas Mortimer
  • Publication number: 20170068144
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 9, 2017
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman, John S. Anderson
  • Patent number: 9442342
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: September 13, 2016
    Assignee: GENTEX CORPORATION
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman, John S. Anderson
  • Patent number: 9405165
    Abstract: A controller system configured to control an electrochromic device and method thereof are provided, wherein the controller system includes an electrochromic device having a first substantially transparent substrate, a second substantially transparent substrate approximately parallel to the first substantially transparent substrate such that a chamber is defined by the first and second substantially transparent substrates, and an electrochromic medium between the first and second substantially transparent substrates, and a controller in communication with the electrochromic device, wherein the controller is configured to monitor electrical power supplied to the electrochromic device and adjust the electrical power supplied to the electrochromic device to maintain the electrochromic device in an approximately minimum transmission state.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 2, 2016
    Assignee: GENTEX CORPORATION
    Inventors: David L. Eaton, Thomas F. Guarr, Kevin L. Ash, David A. Theiste
  • Publication number: 20160033843
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Application
    Filed: August 3, 2015
    Publication date: February 4, 2016
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman, John S. Anderson
  • Patent number: 9096181
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: August 4, 2015
    Assignee: GENTEX CORPORATION
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman, John S. Anderson
  • Publication number: 20150175075
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Application
    Filed: February 23, 2015
    Publication date: June 25, 2015
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman, John S. Anderson
  • Patent number: 8964278
    Abstract: An electro-optic system is provided that includes a front element having first and second surfaces, a rear element including third and fourth surfaces, wherein the front and rear elements are sealably bonded together in a spaced-apart relationship to define a chamber, and an electro-optic medium contained in the chamber, and the electro-optic medium is adapted to be in at least a high transmittance state and a low transmittance state.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: February 24, 2015
    Assignee: Gentex Corporation
    Inventors: Kelvin L. Baumann, John A. VanderPloeg, David A. Theiste, Thomas F. Guarr, Henry A. Luten, George A. Neuman
  • Patent number: 8885242
    Abstract: A variable transmission electrochromic window including: first and second substantially transparent substrates having electrically conductive materials associated therewith; an electrochromic medium contained within a chamber positioned between the first and second substrates which includes at least one solvent, at least one anodic electroactive material, at least one cathodic electroactive material, and wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and wherein the electrochromic window exhibits an Ev of less than approximately 20, and more preferably less than approximately 5, while in a low transmission state during normal daylight conditions.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: November 11, 2014
    Assignee: Gentex Corporation
    Inventors: Thomas F. Guarr, David A. Theiste, Kevin L. Ash, David I. Driscoll, Henry A. Luten
  • Publication number: 20140268289
    Abstract: A variable transmission electrochromic window including: first and second substantially transparent substrates having electrically conductive materials associated therewith; an electrochromic medium contained within a chamber positioned between the first and second substrates which includes at least one solvent, at least one anodic electroactive material, at least one cathodic electroactive material, and wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and wherein the electrochromic window exhibits an Ev of less than approximately 20, and more preferably less than approximately 5, while in a low transmission state during normal daylight conditions.
    Type: Application
    Filed: April 11, 2014
    Publication date: September 18, 2014
    Applicant: GENTEX CORPORATION
    Inventors: THOMAS F. GUARR, DAVID A. THEISTE, KEVIN L. ASH, DAVID I. DRISCOLL, HENRY A. LUTEN
  • Patent number: 8736943
    Abstract: A variable transmission electrochromic window including: first and second substantially transparent substrates having electrically conductive materials associated therewith; an electrochromic medium contained within a chamber positioned between the first and second substrates which includes at least one solvent, at least one anodic electroactive material, at least one cathodic electroactive material, and wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and wherein the electrochromic window exhibits an Ev of less than approximately 20, and more preferably less than approximately 5, while in a low transmission state during normal daylight conditions.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: May 27, 2014
    Assignee: Gentex Corporation
    Inventors: Thomas F. Guarr, David A. Theiste, Kevin L. Ash, David I. Driscoll, Henry A. Luten
  • Patent number: RE48859
    Abstract: A rechargeable lithium-ion cell has a cell capacity and includes a positive electrode having a recharged potential and a negative electrode. The rechargeable lithium-ion cell also includes a charge-carrying electrolyte. The charge-carrying electrolyte includes a charge-carrying medium and a lithium salt. The rechargeable lithium-ion cell also includes a redox shuttle having the following structure.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: December 21, 2021
    Assignee: Board of Trustees of Michigan State University
    Inventors: Thomas F. Guarr, Matthew M. Gregory, Nicholas Robert Boersma, Robert Andrew Polik, Nicholas Mortimer