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US3907598A Expired / Lapsed US ⏱️ 0.0 years remaining

Sealed low drain rate dry cell having in situ stable divalent silver oxide depolarizer

Assignee: ESB Inc
•
Filing: 1973-04-26
•
Granted: 1975-09-23
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Expires: 1993-04-26
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Abstract

Abstract A sealed low drain rate dry cell having an electronegative metal anode, a metal hydroxide electrolyte and in situ stable divalent silver oxide depolarizer.

Inventors

  • 👤 El Sayed Megahed

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 11:38
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 393 words
A SEALED LOW DRAIN RATE CELL COMPRISING IN COMBINATION A. AN ELECTRONEGATIVE METAL ANODE, B. AN ALKALI METAL HYDROXIDE ELECTROLYTE, C. A CELL BARRIER, AND D. AN IN SITU STABLE DIVALENT SILVER OXIDE DEPOLARIZER, WHEREIN THE IN SITU STABLE DIVALENT SILVER OXIDE DEPOLORIZER HAS A MAXIMUM GASSING RATE OF 500 MICROLITERS/GRAM/HR. IN A 2 PERCENT POTASSIUM HYDROXIDE SOLUTION AT 165*F., AND WHEREIN WHEN THE METAL HYDROXIDE IN THE ELECTROLYTE IS: I. SODIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE SODIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 2.0 PERCENT TO ABOUT 20.0 PERCENT, II. LITHIUM HYDROXIDE, THE WEIGHT PERCENTCONCENTRATION OF THE LITHIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 1.2 PERCENT TO ABOUT 13.0 PERCENT, III. POTASSIU, HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE POTASSIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 3.0 PRESENT TO ABOUT 25.0 PRECENT, IV. RUBIDIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE RUBIDIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 5.0 PERCENT TO ABOUT 40.0 PERCENT, V. CESIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE CESIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 7.5 PERCENT TO ABOUT 50.0 PERCENT, 12.. A LOW DRAIN RATE POWER SYSTEM COMPRISING IN COMBINATION: A. A POWER CONSUMING DEVICE, AND B. A SEALED LOW DRAIN RATE CELL IN ELECTRICAL CONTACT THEREWITH, SAID LOW DRAIN RATE CELL COMPRISING I. AN ELECTRONEGAATIVE METAL ANODE, II. AN ALKALI METAL HYDROXIDE ELECTROLYTE, III. A CELL BARRIER, AND IV. AN IN STIU STABLE DIVALENT SILVER OXIDE DEPOLARIZER OF WHEREIN THE IN SIT STABLE DIVALENT SILVER OXIDE DEPOLARIZER OF THE SEALED CELL HAS A MAXIMUM GASSING RATE OF 500 MICROLITERS/GRAM/HOUR IN A 2% POTASSIUM HYDROXIDE SOLUTION AT 165*F., AND WHEREIN WHEN THE METAL HYDROXIDE IN THE ELECTROLYTE IS: I. SODIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE SODIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 2.0 TO ABOUT 20.0 PERCENT II. LITHIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE LITHIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 1.2 TO ABOUT 13.0 PERCENT, II. POTASSIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE POTASSIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 3.0 TO ABOUT 25.0 PERCENT, IV. RUBIDIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF OF THE RUBIDIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 5.0 TO ABOUT 40.0 PERCENT, V. CESIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE CESIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 7.5 TO ABOUT 50.0 PERCENT.
Claim 2
Dependent Claim 393 words
A SEALED LOW DRAIN RATE CELL COMPRISING IN COMBINATION A. AN ELECTRONEGATIVE METAL ANODE, B. AN ALKALI METAL HYDROXIDE ELECTROLYTE, C. A CELL BARRIER, AND D. AN IN SITU STABLE DIVALENT SILVER OXIDE DEPOLARIZER, WHEREIN THE IN SITU STABLE DIVALENT SILVER OXIDE DEPOLORIZER HAS A MAXIMUM GASSING RATE OF 500 MICROLITERS/GRAM/HR. IN A 2 PERCENT POTASSIUM HYDROXIDE SOLUTION AT 165*F., AND WHEREIN WHEN THE METAL HYDROXIDE IN THE ELECTROLYTE IS: I. SODIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE SODIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 2.0 PERCENT TO ABOUT 20.0 PERCENT, II. LITHIUM HYDROXIDE, THE WEIGHT PERCENTCONCENTRATION OF THE LITHIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 1.2 PERCENT TO ABOUT 13.0 PERCENT, III. POTASSIU, HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE POTASSIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 3.0 PRESENT TO ABOUT 25.0 PRECENT, IV. RUBIDIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE RUBIDIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 5.0 PERCENT TO ABOUT 40.0 PERCENT, V. CESIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE CESIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 7.5 PERCENT TO ABOUT 50.0 PERCENT, 12.. A LOW DRAIN RATE POWER SYSTEM COMPRISING IN COMBINATION: A. A POWER CONSUMING DEVICE, AND B. A SEALED LOW DRAIN RATE CELL IN ELECTRICAL CONTACT THEREWITH, SAID LOW DRAIN RATE CELL COMPRISING I. AN ELECTRONEGAATIVE METAL ANODE, II. AN ALKALI METAL HYDROXIDE ELECTROLYTE, III. A CELL BARRIER, AND IV. AN IN STIU STABLE DIVALENT SILVER OXIDE DEPOLARIZER OF WHEREIN THE IN SIT STABLE DIVALENT SILVER OXIDE DEPOLARIZER OF THE SEALED CELL HAS A MAXIMUM GASSING RATE OF 500 MICROLITERS/GRAM/HOUR IN A 2% POTASSIUM HYDROXIDE SOLUTION AT 165*F., AND WHEREIN WHEN THE METAL HYDROXIDE IN THE ELECTROLYTE IS: I. SODIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE SODIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 2.0 TO ABOUT 20.0 PERCENT II. LITHIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE LITHIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 1.2 TO ABOUT 13.0 PERCENT, II. POTASSIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE POTASSIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 3.0 TO ABOUT 25.0 PERCENT, IV. RUBIDIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF OF THE RUBIDIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 5.0 TO ABOUT 40.0 PERCENT, V. CESIUM HYDROXIDE, THE WEIGHT PERCENT CONCENTRATION OF THE CESIUM HYDROXIDE IN THE ELECTROLYTE IS FROM ABOUT 7.5 TO ABOUT 50.0 PERCENT.
Claim 3
Dependent Claim 22 words
A cell according to claim 1 having a drain rate of from about 1 microampere to about 1 milliampere/cm2 of active material.
Claim 4
Dependent Claim 14 words
A cell according to claim 2 wherein the metal of the anode is zinc.
Claim 5
Dependent Claim 13 words
A cell according to claim 3 wherein the zinc is a gelled zinc.
Claim 6
Dependent Claim 13 words
A cell according to claim 3 wherein the zinc is a semi-gelled zinc.
Claim 7
Dependent Claim 16 words
A cell according to claim 2 wherein the metal hydroxide of the electrolyte is sodium hydroxide.
Claim 8
Dependent Claim 16 words
A cell according to claim 2 wherein the metal hydroxide of the electrolyte is potassium hydroxide.
Claim 9
Dependent Claim 16 words
A cell according to claim 2 wherein the metal hydroxide of the electrolyte is lithium hydroxide.
Claim 10
Dependent Claim 16 words
A cell according to claim 2 wherein the metal hydroxide of the electrolyte is rubidium hydroxide.
Claim 11
Dependent Claim 16 words
A cell according to claim 2 wherein the metal hydroxide of the electrolyte is cesium hydroxide.
Claim 12
Dependent Claim 14 words
A cell according to claim 2 wherein the maximum gassing rate is 100 microliters/gram/hour.
Claim 13
Dependent Claim 25 words
A system according to claim 12 wherein the drain rate of this cell is from about 1 microampere to about 1 milliampere/cm2 of active material.
Claim 14
Dependent Claim 18 words
A system according to claim 13 wherein the metal of the anode of the sealed cell is zinc.
Claim 15
Dependent Claim 20 words
A system according to claim 13 wherein the metal hydroxide of the electrolyte of the sealed cell is sodium hydroxide.
Claim 16
Dependent Claim 20 words
A system according to claim 13 wherein the metal hydroxide of the electrolyte of the sealed cell is potassium hydroxide.

References Cited (Backward Citations)

US2650945A Cited
US3615858A Cited
US3476610A Cited
US3484295A Cited
US3530496A Cited
US3617384A Cited
US3655450A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-22 1979-03-24 1979-09-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-22 1983-03-24 1983-09-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-22 1987-03-24 1987-09-23 $7700.00 Window Closed / Lapsed

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