Medtronic, Inc.

Other

Medtronics, Inc.

Douglas J Weiss

Paul M Skarstad

Joseph F Lessar

William G Howard

William John Taylor

Ann M Crespi

Roger W Kelm

Lynn M Seifried

Donald R Merritt

Boone B Owens

John W Cretzmeyer

Fred J Berkowitz

David L Thompson

Glenn M Roline

Robert E Kraska

Lucy M Nichols

Jennifer P Miller

David R Berberick

Paul B Wyborny

Fred J Berkcwitz

An electrochemical cell and electrode assembly in which an alkali metal anode and a cathode assembly are wound together in a unidirectional winding having substantially straight sides such that the winding will fit into a prismatic cell. The anode and cathode are arranged in the winding to provide for even utilization of reactive material during cell discharge by placing cathode and anode material in close proximity throughout the electrode assembly in the proportions in which they are utilized. The winding also contributes to even utilization of reactive material by employing multiple tabs on the cathode assembly to ensure that cathode material is evenly utilized throughout the electrode assembly during cell discharge and also so that connections to the tabs are readily made.

High reliability electrochemical cell and electrode assembly therefor

Method for making a high reliability electrochemical cell and electrode

A hermetically sealed implantable medical device is provided with a multi-pin arrangement including selected glass to metal or ceramic to metal seals for a feedthrough of the compression seal or matched seal type.

Implantable medical device with multi-pin feedthrough

Implantable medical device wtih multi-pin feedthrough

An electrochemical device for production of electrical energy including a case, a primary Faradaic component in the case comprising an active metal anode and a cathode material, an electrochemical capacitor component in the case comprising first and second layers of conductive carbon separated by an electrolyte layer, and means for operatively combining the capacitor component and the primary Faradaic component to charge the capacitor component from the Faradaic component and to maintain the capacitor component in a charged state.

Method for making electrochemical device

Electrochemical device having operatively combined capacitor

A method and apparatus for determination of battery end-of-service in a medical device in which the medical device comprises a cathode limited electrochemical cell having an active metal anode and a manganese dioxide cathode and means for digital telemetry of cell voltage. The sloped, well defined voltage curve of such a cell during cell discharge combined with precise information available through digital telemetry allows for improved determination of battery end-of-service for the medical device.

Method and apparatus for determination of end-of-service for implantable

A lithium battery having a weldable feedthrough which is compatible with liquid electrolytes containing organic solvents and lithium salts under long term use conditions. The feedthrough comprises a pin of niobium or tantalum and ductile alloys thereof and a low silica insulating glass positioned around a portion of the pin in sealing engagement with the pin. The feedthrough is assembled into an aperture of the battery case where it provides an electrically conductive pathway from the anode or cathode to the exterior of the case and provides a hermetic seal.

Battery with weldable feedthrough

Non-aqueous cells employing an anode, such as lithium, a liquid organic electrolyte and a cathode comprising manganese dioxide (MnO.sub.2), carbon monofluoride (CF.sub.x) or mixtures of the two and an additive selected from the group consisting of vanadium oxide (V.sub.6 O.sub.13+y), silver vanadate (.beta.Ag.sub.x V.sub.2 O.sub.5, .delta.Ag.sub.x V.sub.2 O .sub.5 or Ag.sub.2 V.sub.4 O.sub.11), bismuth flouride (BiF.sub.3) and titanium sulfide (TiS.sub.2) as an end-of-service (EOS) indicator.

Electrochemical cells with end-of-service indicator

An improved electrolyte for electrochemical cells including as a cosolvent for the cell electrolyte salt an amount of diglyme; ethyl diglyme; ethyl glyme; triglyme, tetraglyme and higher glymes; dimethoxymethane; 1,2-dimethoxypropane; dimethoxy THF or mixtures thereof.

Electrolyte for lithium-manganese oxide cells and the like

Boroaluminasilicate glass and blended compositions thereof with aluminasilicate glass as seals in feedthroughs.

Glass-metal seals

A hermetic, leak-proof, corrosion resistant electrical feedthrough especially for use with implantable pulse generators. The feedthrough includes a titanium or niobium ferrule, an alumina insulator with a niobium braze area thereon positioned within the ferrule and sealed to the ferrule by a braze of gold at the braze area, electrical lead wires of niobium, tantalum, tungsten, molybdenum or alloys thereof extending through corresponding openings in the insulator, and a body of fusible glass joining and sealing each lead wire to the insulator.

Growing community of inventors

Plymouth, MN, United States of America

Douglas J Weiss