Patents by Inventor Robert F. Scarr

Robert F. Scarr 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).

  • Alkaline cells that are substantially free of mercury
    Patent number: 5464709
    Abstract: Alkaline cells are substantially free of mercury, and employ a zinc anode gel, which gel has a which expansion of less than 25% after being discharged for 161 minutes to 15% depth of discharge at 2.88A.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: November 7, 1995
    Assignee: Eveready Battery Company, Inc.
    Inventors: Dale R. Getz, John C. Nardi, Robert F. Scarr
  • Alkaline cells that employ low expansion zinc in the anode
    Patent number: 5395714
    Abstract: Alkaline cells are substantially free of mercury, employ a zinc anode and do not exhibit leakage after discharge through an electrical resistor to 1.2 volts and then stored under storage conditions of 21.degree. C. for ninety days.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: March 7, 1995
    Assignee: Eveready Battery Company, Inc.
    Inventor: Robert F. Scarr
  • Alkaline cells that are substantially free of mercury
    Patent number: 5364715
    Abstract: Alkaline cells are substantially free of mercury, employ a zinc anode and do not exhibit leakage after discharge through an electrical resistor to 1.2 volts and then stored under storage conditions of 21.degree. C. for ninety days.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: November 15, 1994
    Assignee: Eveready Battery Company, Inc.
    Inventors: Dale R. Getz, John C. Nardi, Robert F. Scarr
  • Electrochemical cell having a coated cup-shaped terminal
    Patent number: 5306580
    Abstract: A cell employing a cup-shaped terminal that has a concave surface coated by electrodeposition of a metal such that the deposited metal contacts the cell's anodic mixture so that the anodic mixture can be made with little or no mercury. A method for producing cup-shaped terminals with a metal electrodeposited on only one side is also disclosed.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: April 26, 1994
    Assignee: Eveready Battery Company, Inc.
    Inventors: Robert N. Mansfield, Jr., Robert F. Scarr
  • Miniature zinc-air cell having an indium plated anode cupe
    Patent number: 5279905
    Abstract: A miniature zinc-air cell employing an anode cup that has an inner indium layer deposited over a copper layer on a conductive substrate such that the indium layer contacts the anodic mixture of the cell so that the anodic mixture can be made with little or no mercury. A method for producing anode cups is also disclosed.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: January 18, 1994
    Assignee: Eveready Battery Company, Inc.
    Inventors: Robert N. Mansfield, Jr., Robert F. Scarr
  • Coated anode current collector for alkaline cells
    Patent number: 5112705
    Abstract: The invention relates to an alkaline zinc cell that uses a conductive anode current collector comprising a conductive substrate, such as a copper-zinc alloy substrate, and wherein the surface of the substrate is coated with a lead-containing layer containing a discontinuous dispersion of lead to effectively reduce gassing at the surface of the anode current collector during storage of the cell.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: May 12, 1992
    Assignee: Eveready Battery Company, Inc.
    Inventors: James C. Hunter, John C. Nardi, Edwin T. Russell, Robert F. Scarr
  • Zinc oxide additive for divalent silver oxide electrodes
    Patent number: 4167609
    Abstract: An alkaline silver oxide cell employing a positive electrode comprising a major amount of divalent silver oxide and wherein a minor amount of zinc oxide is incorporated into the positive electrode to reduce the duration of the divalent silver oxide step voltage normally observed during discharge of the cell.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: September 11, 1979
    Assignee: Union Carbide Corporation
    Inventor: Robert F. Scarr