Patents by Inventor Paul Cheeseman
Paul Cheeseman 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).
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Patent number: 7931981Abstract: The present invention relates to a high capacity electrochemical cell having a cathode containing an oxide of copper as an active material, as well as an anode, an electrolyte, and separators for use with the cathodes of the invention in an alkaline electrochemical cell.Type: GrantFiled: October 20, 2009Date of Patent: April 26, 2011Assignee: Rovcal Inc.Inventors: David Boone, William C. Bushong, Paul Cheeseman, Gregory J. Davidson, Mario Destephen, Zhihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergiy V. Sazhin, Viet H. Vu
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Patent number: 7859220Abstract: A rechargeable electrochemical cell charger is provided for charging electrochemical cells at high current rates. The charger provides a sufficient force between the charge contacts and the cell terminals to remove nonconductive contaminants when the cell is inserted into the charger, thereby increasing the conductivity at the point of contact. The charger can include an air moving system for the dissipation of heat from the electrochemical cell during charging, and a heat sensor to determine the cell temperature during charging.Type: GrantFiled: August 16, 2004Date of Patent: December 28, 2010Assignee: Rovcal, Inc.Inventors: William C. Bushong, Paul Cheeseman, Michael Root, Viet H. Vu
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Patent number: 7763384Abstract: The present invention relates to a high capacity electrochemical cell including an anode, a cathode, and a separator disposed between the anode and cathode. The anode is configured to operate in combination with a quantity of an oxide of copper in the cathode. The cell is capable of operating at a discharge voltage greater than 1.05 volts for at least an initial 5% of a cell discharge period at a current density of at least 5 mA/g, and can include a cathode active material that includes an oxide of copper.Type: GrantFiled: August 9, 2004Date of Patent: July 27, 2010Assignee: Rovcal, Inc.Inventors: David Boone, William C. Bushong, Paul Cheeseman, Gregory J Davidson, Mario Destephen, Zihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergey Sazhin, Viet H. Vu
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Patent number: 7740984Abstract: Aspects of the present invention provide a high capacity electrochemical cell having an anode, a cathode, and a separator disposed between the anode and cathode. The cathode includes a mixture having a first component, a second component and a third component. The first component includes a first element, the second component includes a second element, and the third component includes the first element and the second element. The mixture can, for instance, be a mixed metal oxide. The separator is configured to provide suitable ionic transport between the anode and the cathode.Type: GrantFiled: February 8, 2005Date of Patent: June 22, 2010Assignee: Rovcal, Inc.Inventors: William C. Bushong, Paul Cheeseman, Zhihong Jin, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Viet H. Vu, Deborah Gilbert, Juergen Scherer
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Publication number: 20100112431Abstract: The present invention relates to a high capacity electrochemical cell having a cathode containing an oxide of copper as an active material, as well as an anode, an electrolyte, and separators for use with the cathodes of the invention in an alkaline electrochemical cell.Type: ApplicationFiled: October 20, 2009Publication date: May 6, 2010Applicant: Rovcal Inc.Inventors: David Boone, Wiliam C. Bushong, Paul Cheeseman, Gregory J. Davidson, Mario Destephen, Zihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergey Sazhin, Viet H. Vu
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Patent number: 7645540Abstract: The present invention relates to a high capacity electrochemical cell having a cathode containing an oxide of copper as an active material, as well as an anode, an electrolyte, and separators for use with the cathodes of the invention in an alkaline electrochemical cell.Type: GrantFiled: August 9, 2004Date of Patent: January 12, 2010Assignee: Rovcal, Inc.Inventors: David Boone, William C. Bushong, Paul Cheeseman, Gregory J. Davidson, Mario Destephen, Zhihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergey Sazhin, Viet H. Vu
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Publication number: 20080038634Abstract: An electrochemical cell is provided that includes a container, a cathode and anode disposed in the container, and a separator disposed between the anode and cathode. The cell further includes an extender either included in or separate from the cathode. An agent is further provided that interacts with soluble ionic species generated in the cathode to prevent the migration of the species to the anode.Type: ApplicationFiled: December 10, 2004Publication date: February 14, 2008Applicant: Rovcal, Inc.Inventors: William C. Bushong, Paul Cheeseman, Gregory J. Davidson, Zihong Jin, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Viet H. Vu
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Patent number: 7288920Abstract: A rechargeable electrochemical cell is provided having a pressure-responsive apparatus for determining a charge termination point. In particular, a reversible pressure-responsive switch may be disposed in a cap at the open end of a rechargeable metal hydride cell. The reversible pressure-responsive switch may also contain a vent system for releasing the cell internal pressure. Alternatively, a rechargeable cell may include a strain gauge disposed in its outer surface whose resistance changes as the outer surface of the battery expands due to internal pressure accumulation during charging. Additionally, a rechargeable cell is used combination with a charging source that can supply constant voltage, constant current, alternating current, or voltage that varies between a minimum threshold and a maximum threshold.Type: GrantFiled: March 21, 2005Date of Patent: October 30, 2007Assignee: Spectrum Brands, Inc. ( FKA Rayovac Corporation)Inventors: William C. Bushong, Paul Cheeseman, Thomas Kaufman, Michael Root, Aaron Rositch, Marc L. Syvertsen, Viet H. Vu
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Publication number: 20050271941Abstract: Aspects of the present invention provide a high capacity electrochemical cell having an anode, a cathode, and a separator disposed between the anode and cathode. The cathode includes a mixture having a first component, a second component and a third component. The first component includes a first element, the second component includes a second element, and the third component includes the first element and the second element. The mixture can, for instance, be a mixed metal oxide. The separator is configured to provide suitable ionic transport between the anode and the cathode.Type: ApplicationFiled: February 8, 2005Publication date: December 8, 2005Inventors: William Bushong, Paul Cheeseman, Zhihong Jin, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Viet Vu, Deborah Gilbert, Juergen Scherer
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Publication number: 20050088140Abstract: A rechargeable electrochemical cell charger is provided for charging electrochemical cells at high current rates. The charger provides a sufficient force between the charge contacts and the cell terminals to remove nonconductive contaminants when the cell is inserted into the charger, thereby increasing the conductivity at the point of contact. The charger can include an air moving system for the dissipation of heat from the electrochemical cell during charging, and a heat sensor to determine the cell temperature during charging.Type: ApplicationFiled: August 16, 2004Publication date: April 28, 2005Inventors: William Bushong, Paul Cheeseman, Michael Root, Viet Vu
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Publication number: 20050084755Abstract: The present invention relates to a high capacity electrochemical cell including a cathode that can contain an oxide of copper as an active material, an anode, an electrolyte, and a separator disposed between the anode and the cathode. The oxide can have surface area greater than 0.5 m2/g, and the cathode can include an additive that increases the discharge voltage of the cell. In some cases the additive has a lower voltage than the oxide alone. The additive can have a surface area within the range defined by a lower limit of 0.5 m2/g and an upper limit of 100 m2/g. The anode can include a quantity of mercury below 0.025%.Type: ApplicationFiled: August 9, 2004Publication date: April 21, 2005Inventors: David Boone, William Bushong, Paul Cheeseman, Gregory Davidson, Mario Destephen, Zihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergey Sazhin, Viet Vu
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Publication number: 20050079415Abstract: The present invention relates to a high capacity electrochemical cell including an anode, a cathode, and a separator disposed between the anode and cathode. The anode is configured to operate in combination with a quantity of an oxide of copper in the cathode. The cell is capable of operating at a discharge voltage greater than 1.05 volts for at least an initial 5 % of a cell discharge period at a current density of at least 5 mA/g, and can include a cathode active material that includes an oxide of copper.Type: ApplicationFiled: August 9, 2004Publication date: April 14, 2005Inventors: David Boone, William Bushong, Paul Cheeseman, Gregory Davidson, Mario Destephen, Zihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergey Sazhin, Viet Vu
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Publication number: 20050074674Abstract: The present invention relates to a high capacity electrochemical cell having a cathode containing an oxide of copper as an active material, as well as an anode, an electrolyte, and separators for use with the cathodes of the invention in an alkaline electrochemical cell.Type: ApplicationFiled: August 9, 2004Publication date: April 7, 2005Inventors: David Boone, William Bushong, Paul Cheeseman, Gregory Davidson, Mario Destephen, Zihong Jin, Jon Luecke, Erik Mortensen, Ernest Ndzebet, Karthik Ramaswami, Sergey Sazhin, Viet Vu
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Publication number: 20040145344Abstract: A rechargeable electrochemical cell is provided having a pressure-responsive apparatus for determining a charge termination point. In particular, a reversible pressure-responsive switch may be disposed in a cap at the open end of a rechargeable metal hydride cell. The reversible pressure-responsive switch may also contain a vent system for releasing the cell internal pressure. Additionally, a rechargeable cell is used combination with a charging source that can supply constant voltage, constant current, alternating current, or voltage that varies between a minimum threshold and a maximum threshold. Components of the switch are preferably made of a material that facilitates predictable switch activity.Type: ApplicationFiled: October 27, 2003Publication date: July 29, 2004Inventors: William C. Bushong, Paul Cheeseman, Greg Davidson, Tom Kaufman, Richard Mank, Michael Root, Aaron Rositch, Viet H. Vu
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Publication number: 20020119364Abstract: A rechargeable electrochemical cell is provided having a pressure-responsive apparatus for determining a charge termination point. In particular, a reversible pressure-responsive switch may be disposed in a cap at the open end of a rechargeable metal hydride cell. The reversible pressure-responsive switch may also contain a vent system for releasing the cell internal pressure. Alternatively, a rechargeable cell may include a strain gauge disposed in its outer surface whose resistance changes as the outer surface of the battery expands due to internal pressure accumulation during charging. Additionally, a rechargeable cell is used combination with a charging source that can supply constant voltage, constant current, alternating current, or voltage that varies between a minimum threshold and a maximum threshold.Type: ApplicationFiled: October 19, 2001Publication date: August 29, 2002Inventors: William H. Bushong, Paul Cheeseman, Thomas Kaufman, Michael Root, Aaron Rositch, Marc L. Syvertsen, Viet H. Vu
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Patent number: 6037071Abstract: A current interrupt mechanism for electrochemical cells is disclosed. A thermally activated current interrupt mechanism is integrated into an end cap assembly for an electrochemical cell. The thermally responsive mechanism preferably includes a free floating bimetallic disk or shape memory alloy member which deforms when exposed to elevated temperature causing a break in an electrical pathway within the end cap assembly. This prevents current from flowing through the cell and effectively shuts down an operating cell. The thermally responsive mechanism may include a heat producing electrical resistance means, preferably a Zener diode, to enhance thermal sensitivity. The end cap assembly may include a pressure responsive mechanism which ruptures when there is extreme gas pressure buildup. Gas is allowed to escape from the cell interior to the external environment through a series of vent apertures within the end cap assembly.Type: GrantFiled: November 6, 1997Date of Patent: March 14, 2000Assignee: Duracell IncInventors: Jeffrey Poirier, Paul Cheeseman, Michael McDermott, Jane A. Blasi, Reynald Cantave, Jeffrey Hewes, Yelena Kouznetsova, Bhupendra Patel, Alex Kaplan, Viet Vu, William T. McHugh, Lucien P. Fontaine, Robert J. Pinault
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Patent number: 5998051Abstract: A current interrupt assembly for electrochemical cells is disclosed. The current interrupter assembly may be a self-contained, sealed unit which may be separately inserted into the cell during cell construction. Several current interrupt assemblies may be inserted in the cell. The current interrupter assembly has particular utility for thin rechargeable cells and when inserted in the cell forms a portion of the electrical pathway between a cell electrode and corresponding terminal. The current interrupt mechanism comprises a thin thermally responsive member preferably comprising a disk of a shape memory metal alloy having a curved surface. The current interrupt mechanism may include a heat producing electrical resistance means, preferably a Zener diode in proximity to the thermally responsive member. When cell temperature exceeds a predetermined value the disk deflects to cause a break in the electrical pathway within the assembly.Type: GrantFiled: November 6, 1997Date of Patent: December 7, 1999Assignee: Duracell Inc.Inventors: Jeffrey Poirier, Paul Cheeseman, Michael McDermott, Jane A. Blasi, Reynald Cantave, Jeffrey Hewes, Yelena Kouznetsova, Bhupendra Patel, Alex Kaplan, Viet Vu, William T. McHugh, Lucien P. Fontaine, Robert J. Pinault