Patents by Inventor Stephen R. Clarke

Stephen R. Clarke 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: 11239507
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: February 1, 2022
    Assignee: AQUA METALS INC.
    Inventors: Brian Dougherty, Michael John King, Robert Lewis Clarke, Stephen R. Clarke, Michael David Hurwitz
  • Patent number: 10793957
    Abstract: A closed loop electrochemical process of recovery of high-purity lead uses continuous formation of adherent lead on a cathode from an electrolyte that is used to dissolve desulfated lead paste.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: October 6, 2020
    Assignee: AQUA METALS INC.
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Brian Dougherty
  • Patent number: 10689769
    Abstract: The inventive subject matter is directed to continuous electrochemical production of highly pure micro- or nanostructured lead that at least partially encloses the electroprocessing solvent and molecular hydrogen and optional guest compounds to form a mixed matrix. Such compositions are particularly suitable for cold forming of various structures and/or for alloy and composite material production.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: June 23, 2020
    Assignee: Aqua Metals Inc.
    Inventors: Stephen R. Clarke, Michael John King, Brian Dougherty, Michael David Hurwitz
  • Patent number: 10665907
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining, and spent electroprocessing solvent can be recycled to the recovery process.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: May 26, 2020
    Assignee: Aqua Metals Inc.
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould
  • Patent number: 10566665
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining, and spent electroprocessing solvent can be recycled to the recovery process.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: February 18, 2020
    Assignee: Aqua Metals Inc.
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould
  • Publication number: 20190267681
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.
    Type: Application
    Filed: May 9, 2019
    Publication date: August 29, 2019
    Inventors: Brian Dougherty, Michael John King, Robert Lewis Clarke, Stephen R. Clarke, Michael David Hurwitz
  • Patent number: 10340561
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: July 2, 2019
    Assignee: Aqua Metals Inc.
    Inventors: Brian Dougherty, Michael John King, Robert Lewis Clarke, Stephen R. Clarke, Michael David Hurwitz
  • Publication number: 20180355494
    Abstract: A closed loop electrochemical process of recovery of high-purity lead uses continuous formation of adherent lead on a cathode from an electrolyte that is used to dissolve desulfated lead paste.
    Type: Application
    Filed: May 13, 2016
    Publication date: December 13, 2018
    Applicant: Aqua Metals Inc.
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Brian Dougherty
  • Publication number: 20180127888
    Abstract: The inventive subject matter is directed to continuous electrochemical production of highly pure micro- or nanostructured lead that at least partially encloses the electroprocessing solvent and molecular hydrogen and optional guest compounds to form a mixed matrix. Such compositions are particularly suitable for cold forming of various structures and/or for alloy and composite material production.
    Type: Application
    Filed: May 13, 2016
    Publication date: May 10, 2018
    Inventors: Stephen R. Clarke, Michael John King, Brian Dougherty, Michael David Hurwitz
  • Publication number: 20180069276
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining, and spent electroprocessing solvent can be recycled to the recovery process.
    Type: Application
    Filed: November 13, 2017
    Publication date: March 8, 2018
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould
  • Publication number: 20170352927
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.
    Type: Application
    Filed: May 13, 2015
    Publication date: December 7, 2017
    Inventors: Brian Dougherty, Michael John King, Robert Lewis Clarke, Stephen R. Clarke, Michael David Hurwitz
  • Patent number: 9837689
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining and spent electroprocessing solvent can be recycled to the recovery process.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: December 5, 2017
    Assignee: Aqua Metals Inc.
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould
  • Patent number: 9672953
    Abstract: Compositions, devices, and methods of stabilizing Magneli phase materials are presented where the modified materials have a host phase and a locking phase in which locking compounds prevent rearrangement of a Magneli shear plane to a rutile structure and so prevent or reduce the oxidation of the Magneli phase material.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: June 6, 2017
    Inventors: Stephen R. Clarke, Robert Clarke
  • Publication number: 20160294024
    Abstract: Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining and spent electroprocessing solvent can be recycled to the recovery process.
    Type: Application
    Filed: November 18, 2014
    Publication date: October 6, 2016
    Inventors: Stephen R. Clarke, Robert Lewis Clarke, Michael David Hurwitz, Michael John King, Selwyn Mould
  • Publication number: 20160217881
    Abstract: Compositions, devices, and methods of stabilizing Magneli phase materials are presented where the modified materials have a host phase and a locking phase in which locking compounds prevent rearrangement of a Magneli shear plane to a rutile structure and so prevent or reduce the oxidation of the Magneli phase material.
    Type: Application
    Filed: March 27, 2015
    Publication date: July 28, 2016
    Inventors: Stephen R. Clarke, Robert Clarke
  • Patent number: 6383395
    Abstract: A media is used to remove species from aqueous solutions, particularly in the treatment of water to enable it to be suitable for drinking. The media includes a material selected from the group consisting of zirconium hydroxide, titanium hydroxide, hafnium hydroxide and combinations thereof. A preferred form of the media is a layer having an aspect ratio of at least 1:1, more preferably, at least about 10:1. Removed from the water are species selected from the group consisting of arsenate, selenate, chromate, borate, perchlorate, fluoride and combinations thereof. In particular arsenite (As+3) containing species are also removed from water. Arsenite may be removed from water to levels not greater than 10 parts per billion with a single exposure to the media. The media is selective for certain species over others.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: May 7, 2002
    Assignee: Luxfer Group Limited
    Inventors: Stephen R. Clarke, Richard J. Clarke, Roderick Murdock, Clive J. Butler, Sam Mohanta
  • Patent number: 5846393
    Abstract: An integrated electrochemical soil remediation method and apparatus for treating contaminated soils, especially those contaminated with mixtures of nonvolatile organic contaminants, ionic contaminants and volatile organic compounds are disclosed. Remediation may be achieved by electrochemically enhancing biodigestion of organic contaminants (using microorganisms present in or added to soil), electrochemically removing ionic contaminants and electrochemically removing volatilized organic contaminants by applying a vacuum over the soil being treated, as dictated by the nature of contamination. Physicochemical conditions of the electrolyte and the soil are managed by monitoring and adjusting the electrolyte. Nutritional needs of microorganisms for biodigestion are adjusted as necessary through the electrolyte.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: December 8, 1998
    Assignee: Geo-Kinetics International, Inc.
    Inventors: Robert L. Clarke, Reinout Lageman, Wieberen Pool, Stephen R. Clarke