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Assignee: Rayovac Corporation


Location: Madison, WI
No. of patents: 134

1        
NumberTitleIssue Date
7226696Alkaline cell with performance enhancing additives
Alkaline electrochemical cells having extended service life and acceptable gassing and corrosion properties are disclosed. An amphoteric surfactant can be incorporated into the gelled anode mixture of an alkaline electrochemical cell, optionally with an organic phos...
06/05/2007
7005213Ionically conductive additive for zinc-based anode in alkaline electrochemical cells
An anode is provided for an electrochemical cell having an ionically conductive additive, such as Laponite® or any alternative clay suitable to improve the transport of hydroxyl ions into anode during discharge. ...
02/28/2006
6927000Oxazoline surfactant anode additive for alkaline electrochemical cells
According to the present invention an alkaline electrochemical cell can contain an anode having an anode active material, an alkaline electrolyte, a gelling agent and an oxazoline surfactant additive. The invention relates to an anode mix, to an anode containing the...
08/09/2005
6878481Method and apparatus for regulating charging of electrochemical cells
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. T...
04/12/2005
D501137Battery package
01/25/2005
6794074Air manager for metal-air cells
An air manager is provided for supplying air to a battery that may be disposed in a battery compartment of an electrical device. The battery includes at least one air-depolarized cell to supply power to the device. The air manager achieves a dual function of stimula...
09/21/2004
6780347Manganese oxide based electrode for alkaline electrochemical system and method of its production
A method is disclosed for preparing cathodes loaded with manganese oxide that are suitable for use in metal-air cells. The manganese oxide is prepared from the reduction of potassium permanganate by sodium formate at a substantially neutral pH level to produce manga...
08/24/2004
6659281Button cell battery pack
A battery pack suitable for use with button cell batteries. The battery pack includes a flexible card and a cover rotatably fixed relative to said flexible card. A backing is interposed between the card and said cover, and fixed relative to said card. The...
12/09/2003
6653016Extended temperature operating range electrochemical cells
An electrochemical cell having a cell can that includes an interior surface, a current collector, a solid cathode contained in the can and in conductive contact therewith, an organic or solid polymer electrolyte comprising lithium salt solutes and aprotic...
11/25/2003
6569563Air depolarized electrochemical button cell
Cathode cans for use in air depolarized cells, and cells made with such cans. The side wall is stronger than the bottom wall, and has a smoother outwardly-disposed surface than the respective bottom wall surface. Strength, and thus hardness, of the side w...
05/27/2003
6478158Battery package with multiple support compartments
A retail package for round cell batteries is a transparent single sheet thermoformed clamshell having a cover connected along a hinge to a base which receives an array of upwardly extending batteries. The base has a side wall which extends upwardly from a...
11/12/2002
6461761Air depolarized electrochemical cells
An elongate, generally tubular, air depolarized electrochemical cell (10) comprising a cathode (14), including an air cathode assembly (26), extending about the tubular circumference, and along the tubular length, of the cell (10), an anode (12), a separa...
10/08/2002
6436571Bottom seals in air depolarized electrochemical cells
An elongate, generally tubular, air depolarized electrochemical cell (10) comprising a cathode (14), including an air cathode assembly (26), extending about the tubular circumference, and along the tubular length, of the cell (10), an anode (12), a separa...
08/20/2002
6419091Battery package with battery support
A retail package for round cell batteries is a transparent single sheet thermoformed clamshell having a cover connected along a hinge to a base which receives an array of upwardly extending batteries. The base has a side wall which extends upwardly from a...
07/16/2002
6372381Duplex-coated cathode cans, and electrochemical cells made therewith
Improved cathode cans, for use in electrochemical cells. Broadly, the cans comprise corrosion-susceptible core layers, and protective metal layers such as nickel overlying the core layer and disposed between the core layer and a, preferably electroless pl...
04/16/2002
6368738Air depolarized electrochemical cell
An air depolarized cell comprises an anode, a cathode, including an air cathode assembly openly exposed to the ambient environment and/or defining at least a portion of the outer surface of the cell. The cell can comprise a bottom member defining a bottom...
04/09/2002
6296961Composite carbon sheet, and electrochemical cells made therewith
Cathode assembly precursor cathode assembly (26) and elongate air depolarized electrochemical cells (10) made therewith. Cathode assembly precursor comprises a closed-loop elongate cathode current collector (32), and perforations (56) from outer to inner ...
10/02/2001
6284400Metal-air cathode can, and electrochemical cell made therewith
This invention pertains to metal-air electrochemical cells wherein one or more air entry ports is located in the bottom of the cathode can, to provide for entry of oxygen-rich air into the cathode can, where the oxygen participates in the electrochemical ...
09/04/2001
6280876Metal-air cathode can having reduced corner and electrochemical cells made therewith
This invention pertains to electrode cans and metal air electrochemical cells made with the electrode cans. The invention provides improvide structure, and methods for making the outer edge of the closed end of the can at the joinder of the closed end of ...
08/28/2001
6261709Air depolarized electrochemical cell having mass-control chamber in anode
This invention teaches an elongate air depolarized electrochemical cell. The cell has a cathode, including an air cathode assembly, and a separator disposed inwardly of the air cathode assembly. A bottom member defines a bottom of the cell. An anode cavit...
07/17/2001
6248463Metal-air cathode can and electrochemical cell made therewith
This invention pertains to metal-air electrochemical cells wherein one or more air entry ports is located in the bottom of the cathode can, to provide for entry of oxygen-rich air into the cathode can, where the oxygen partcicpates in the chemical reactio...
06/19/2001
6245452Electrochemical cells and components thereof
This invention pertains to electrochemical cells, typically to air depolarized cells of the button-type. Non-reactive elements of cells of the invention are thinner than corresponding non-reactive elements of prior art cells. Such elements can be made thi...
06/12/2001
6244444Peggable reclosable battery package
A battery package has a thermoformed thermoplastic clam shell container with a lid which snaps closed on a battery containing body. The lid has peripheral skirt portions defining shoulders which face downwardly. A lower segment of a paperboard card is cla...
06/12/2001
6210826Seals, and electrochemical cells made therewith
An elongate air depolarized electrochemical cell (10). A grommet (18) closes the top of the cell (10). A seal (36) can extend upwardly into a slot (174) between the grommet (18) and a top closure member (177) such as at the top of a cathode can (28), or a...
04/03/2001
6210827Elongate air depolarized electrochemical cells
An elongate, generally tubular, air depolarized electrochemical cell (10) comprising a cathode (14), including an air cathode assembly (26), extending about the tubular circumference, and along the tubular length, of the cell (10), an anode (12), a separa...
04/03/2001
6205831Method for making a cathode can from metal strip
Cathode cans for use in air depolarized cells, and cells made with such cans. The side wall is stronger than the bottom wall, and has a smoother outwardly-disposed surface than the respective bottom wall surface. Strength, and thus hardness, of the side w...
03/27/2001
6203940Tubular air depolarized cell
An elongate, generally tubular, air depolarized electrochemical cell (10) comprising a cathode (14), including an air cathode assembly (26), extending about the tubular circumference, and along the tubular length, of the cell (10), an anode (12). a separa...
03/20/2001
6197445Air depolarized electrochemical cells
An elongate, generally tubular, air depolarized electrochemical cell (10) comprising a cathode (14), including an air cathode assembly (26), extending about the tubular circumference, and along the tubular length, of the cell (10), an anode (12), a separa...
03/06/2001
6153330Alkaline manganese dioxide electrochemical cell having coated can treated with silicon compounds
The performance characteristics of alkaline manganese dioxide cells are improved by applying a thin, polymeric coating to the inner surface of an unplated steel positive current collector, and including a silicon compound in the coating. The polymeric coa...
11/28/2000
6087030Electrochemical cell anode and high discharge rate electrochemical cell employing same
This invention pertains to novel alkaline electrochemical cells having high drain capacities, especially cells having high drain rate capabilities at voltages of at least 1.1 volts for use in small appliances such as hearing aids. The anode includes anode...
07/11/2000
6042957Thin walled electrochemical cell
This invention pertains to alkaline electrochemical cells, typically to metal-air cells of the button-type. Non-reactive elements of cells of the invention are thinner than corresponding non-reactive elements of prior art cells. Such elements can be made ...
03/28/2000
6039185Hearing aid battery inserter
A thin flexible sheet of PETG or similar plastic has a disk shaped body with a number of radially protruding petals. The outer perimeter of one side of the inserter is coated with a pressure sensitive adhesive. A hearing aid battery with its connected sel...
03/21/2000
6040074Metal-air cathode can, and electrochemical cell made therewith
This invention pertains to metal-air electrochemical cells wherein one or more air entry ports is located in the bottom of the cathode can, to provide for entry of oxygen-rich air into the cathode can, where the oxygen participates in the electrochemical ...
03/21/2000
6040088Sodium polyacrylate gelling agent for zinc gelled anode
A sodium polyacrylate superabsorbent polymer made by bulk polymerization and characterized as described herein is a superior gelling agent when provided at a suitable concentration in a gelled anode for an alkaline electrochemical cell. Suitable gelled an...
03/21/2000
6010802Current collector assembly
Collector assemblies and methods of making and using them, and electrochemical cells made with such current collector assemblies, are disclosed. The invention provides a current collector assembly which permits safe, effective venting of pressure in the c...
01/04/2000
6001508AgO cathode battery
Solid divalent silver oxide is reacted in hot aqueous alkaline reaction medium with a solid bismuth component and a reducing agent. The reaction product comprises a novel compound containing silver, bismuth, and oxygen, which is used in making cathode pel...
12/14/1999
5993022Multi-pivot flashlight
A flashlight has a center pivot mechanical connection between a plastic battery housing and a rotatable plastic turret, permitting free rotation of the turret. A lamp housing is pivotable within the turret about an axis perpendicular to the center pivot. ...
11/30/1999
5958615Metal-air cathode can, and electrochemical cell made therewith
This invention pertains to metal-air electrochemical cells wherein one or more air entry ports is located in the bottom of the cathode can, to provide for entry of oxygen-rich air into the cathode can, where the oxygen participates in the chemical reactio...
09/28/1999
5945234Metal-air cathode can having reduced corner radius and electrochemical cells made therewith
This invention pertains to electrode cans and metal air electrochemical cells made with the electrode cans. The invention provides improved structure, and methods for making the outer edge of the closed end of the can at the joinder of the closed end of t...
08/31/1999
5945230Toed-in anode can and electrochemical cell made therewith
This invention pertains to electrochemical cells, and anode cans used therein, wherein edge regions of respective anode cans are toed-in. The anode can includes a top wall, and a first side wall depending downwardly from the top wall. The first side wall ...
08/31/1999
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