Patent US3847668A successfully refreshed from Google Patents.
US3847668A
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Alkaline accumulator operated in gas-tightly sealed condition
Assignee: VARTA AG
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Filing: 1972-11-14
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Granted: 1974-11-12
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Expires: 1992-11-14
Abstract
Abstract An accumulator of the alkaline type permanently sealed against gas and moisture includes a negative electrode having electronegative active matter, a positive electrode having an excess of chargeable negative matter and antipolar matter, and an oxidation product of a reducing agent conductively connected to the positive electrode, the reducing agent being more strongly electronegative than the active matter of the negative electrode.
Inventors
- 👤 G Kramer
- 👤 H Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:10
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
IN AN ACCUMULATOR OF THE ALKALINE TYPE PERMANENTLY SEALED AGAINST GAS AND MOISTURE, A NEGATIVE ELECTRODE HAVING A CHARGE RESERVE AND A DISCHARGE RESERVE, A POSITIVE ELECTRODE CONTAINING POSITIVE ACITVE MASS AND ANTIPOLAR MATTER, AND AN OXIDATION PRODUCT OF ZINC, SAID OXIDATION PRODUCT BEING FORMED BY INTRODUCING INTO THE ACCUMULATOR PRIOR TO SEALING, METALLIC ZINC AS A REDUCING AGENT CONDUCTIVELY CONNECTED TO SAID ANTIPOLAR MATTER OF SAID POSITIVE ELECTRODE, WHICH ZINC TOGETHER WITH SAID ALKALINE ELECTROLYTE EFFECT REACTION AND REDUCTION OF A PORTION OF THE ANTIPOLAR MATTER OF THE POSITIVE
Claim 2
Dependent Claim
90 words
IN AN ACCUMULATOR OF THE ALKALINE TYPE PERMANENTLY SEALED AGAINST GAS AND MOISTURE, A NEGATIVE ELECTRODE HAVING A CHARGE RESERVE AND A DISCHARGE RESERVE, A POSITIVE ELECTRODE CONTAINING POSITIVE ACITVE MASS AND ANTIPOLAR MATTER, AND AN OXIDATION PRODUCT OF ZINC, SAID OXIDATION PRODUCT BEING FORMED BY INTRODUCING INTO THE ACCUMULATOR PRIOR TO SEALING, METALLIC ZINC AS A REDUCING AGENT CONDUCTIVELY CONNECTED TO SAID ANTIPOLAR MATTER OF SAID POSITIVE ELECTRODE, WHICH ZINC TOGETHER WITH SAID ALKALINE ELECTROLYTE EFFECT REACTION AND REDUCTION OF A PORTION OF THE ANTIPOLAR MATTER OF THE POSITIVE
Claim 3
Dependent Claim
28 words
Accumulator according to claim 1 wherein said oxidation product, in electrochemical equivalents, is at most equal in quantity to the amount of antipolar matter of said positive electrode.
Claim 4
Dependent Claim
24 words
Accumulator according to claim 1 wherein the oxidation product of said reducing agent is partly contained in the antipolar matter of said positive electrode.
Claim 5
Dependent Claim
19 words
Accumulator according to claim 1 wherein the oxidation product of said reducing agent is partly contained in said electrolyte.
References Cited (Backward Citations)
US2934581A
Cited
US3066178A
Cited
US3174878A
Cited
US3170819A
Cited
US3174879A
Cited
US3351490A
Cited
US3595697A
Cited
US3558356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |