Patents by Inventor Christopher F. Randell

Christopher F. Randell 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).

  • Optimised alkaline electrochemical cells
    Patent number: 7232628
    Abstract: Alkaline electrochemical cells with substantially increased performance characteristics have a porous anode, with a porosity equal to or greater than 69%, and a porous cathode, comprising manganese dioxide and having a porosity equal to or greater than 26%.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: June 19, 2007
    Assignee: Eveready Battery Company, Inc.
    Inventor: Christopher F. Randell
  • Zinc shapes for anodes of electrochemical cells
    Patent number: 7045253
    Abstract: An electrochemical cell 30 which contains both a cathode 32 and an anode 34. The anode contains a mixture of uniformly shaped particles 10 and electrolyte. The anode can also contain a zinc powder comprising non-uniform shaped, which can be mixed with the uniformly shaped particles of the present invention.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: May 16, 2006
    Assignee: Eveready Battery Company, Inc.
    Inventors: David G. Clash, Robert N. Mansfield, Jr., Christopher F. Randell, Nghia Cong Tang, Lewis F. Urry
  • Optimised alkaline electrochemical cells
    Publication number: 20040197655
    Abstract: Alkaline electrochemical cells with substantially increased performance characteristics have a porous anode, with a porosity equal to or greater than 69%, and a porous cathode, comprising manganese dioxide and having a porosity equal to or greater than 26%.
    Type: Application
    Filed: December 8, 2003
    Publication date: October 7, 2004
    Inventor: Christopher F Randell
  • Separator for electrochemical cells
    Publication number: 20040166416
    Abstract: A copolymer of an ethylenically unsaturated carboxylic acid, e.g. acrylic or methacrylic acid, and an aromatic sulphonate or carboxylate, e.g. sodium styrenesulphonate, either alone or supported on a substrate, may be used as a separator for an electrochemical cell.
    Type: Application
    Filed: December 8, 2003
    Publication date: August 26, 2004
    Inventors: Christopher F Randell e, Mark A Schubert, John p Myers
  • Zinc shapes for anodes of electrochemical cells
    Publication number: 20040166413
    Abstract: An electrochemical cell 30 which contains both a cathode 32 and an anode 34. The anode contains a mixture of uniformly shaped particles 10 and electrolyte. The anode can also contain a zinc powder comprising non-uniform shaped, which can be mixed with the uniformly shaped particles of the present invention.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 26, 2004
    Inventors: David G. Clash, Robert N. Mansfield, Christopher F. Randell, Nghia Cong Tang, Lewis F. Urry
  • Phosphate ester additive to alkaline cells to reduce gassing
    Patent number: 5378559
    Abstract: Alkaline zinc cells employing a brass anode current collection and little or no mercury and wherein a specific phosphate ester is added, preferably to the anode, to reduce gassing attributed to the brass anode current collector.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: January 3, 1995
    Assignee: Eveready Battery Company, Inc.
    Inventors: Christopher F. Randell, David Kilby