Medtronic, Inc.

Gould Inc.

John W Cretzmeyer

Paul M Skarstad

Douglas J Weiss

William G Howard

Ann M Crespi

Donald R Merritt

David R Berberick

John C Strohkirch

Hans R Espig

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

One-piece electrochemical cell cover with improved seal area in the fill port. The fill port comprises a countersunk area and an integral boss formed directly underneath the countersunk area.

Electrochemical cell with improved fill port

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

Metal/oxygen cells such as zinc/air cells are provided with optimum active life characteristics by interposing, on the air side of the cell, an oxygen diffusivity-limiting membrane, such as, for example, sintered polytetrafluoroethylene, so that no more oxygen is received than is needed for the current rate required for the intended application.

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Richfield, MN, United States of America

John W Cretzmeyer