Patents by Inventor Stephen Florence

Stephen Florence 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).

  • Releasing impurities from a calcium-based mineral
    Patent number: 10988387
    Abstract: A method for releasing impurities from a calcium-based mineral is described. The method comprises reacting a calcium-based mineral containing impurities with an aqueous solution of one or more ionic salts at a temperature of approximately 85° C. or above, wherein at least one of the calcium-based mineral and the one or more ionic salts comprises sulphate and at least one of the calcium-based mineral and the one or more ionic salts comprises ammonium, and wherein the concentration of the solution is approximately 25% or higher mass fraction, such that double salt crystals are formed and impurities are released. The method further comprises separating the double salt crystals from the impurities. Various products of the process are also described.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: April 27, 2021
    Assignee: Carbon Cycle Limited
    Inventors: Waqas Mirza, Stephen Florence, Ian Thaxter, David Sevier
  • RELEASING IMPURITIES FROM A CALCIUM-BASED MINERAL
    Publication number: 20200071179
    Abstract: A method for releasing impurities from a calcium-based mineral is described. The method comprises reacting a calcium-based mineral containing impurities with an aqueous solution of one or more ionic salts at a temperature of approximately 85° C. or above, wherein at least one of the calcium-based mineral and the one or more ionic salts comprises sulphate and at least one of the calcium-based mineral and the one or more ionic salts comprises ammonium, and wherein the concentration of the solution is approximately 25% or higher mass fraction, such that double salt crystals are formed and impurities are released. The method further comprises separating the double salt crystals from the impurities. Various products of the process are also described.
    Type: Application
    Filed: December 8, 2017
    Publication date: March 5, 2020
    Inventors: Waqas Mirza, Stephen Florence, Ian Thaxier, David Sevier
  • Fuel cell insulating heat exchanger
    Patent number: 7226681
    Abstract: An enclosure for a fuel cell stack for insulating the hot zone of the fuel cell stack and for exchanging heat from the fuel cell stack to a reactant that passes through the enclosure to be used by the fuel cell stack. The enclosure comprises at least one chamber having an intake means for the reactant and an exhaust means for passing the reactant to the fuel cell stack. In one embodiment there are three layered chambers.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: June 5, 2007
    Inventors: Stephen Florence, Joseph English, Bryce Sharman, Glenn Price
  • FUEL CELL INSULATING HEAT EXCHANGER
    Publication number: 20040086765
    Abstract: An enclosure for a fuel cell stack for insulating the hot zone of the fuel cell stack and for exchanging heat from the fuel cell stack to a reactant that passes through the enclosure to be used by the fuel cell stack. The enclosure comprises at least one chamber having an intake means for the reactant and an exhaust means for passing the reactant to the fuel cell stack. In one embodiment there are three layered chambers.
    Type: Application
    Filed: June 23, 2003
    Publication date: May 6, 2004
    Inventors: Stephen FLORENCE, Joseph ENGLISH, Bryce SHARMAN, Glenn PRICE