US2969413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline accumulators
Assignee: Accumulatoren Fabrik AG
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Filing: 1958-09-24
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Granted: 1961-01-24
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Expires: 1978-09-24
Abstract
No abstract record available.
Inventors
- 👤 Peters Freimut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:07
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/80; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/10; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
IN A METHOD OF PRODUCING AN ELECTRODE PLATE ADAPTED FOR USE IN AN ALKALINE STORAGE BATTERY, THE STEPS OF FORMING A PULVERULENT MASS CONSISTING ESSENTIALLY OF BETWEEN 50% AND 70% COPPER POWDER HAVING A BULK WEIGHT WITHIN THE RANGE OF 0.5 TO 1.5 GRAMS PER CUBIC CENTIMETER AND APPROXIMATELY 80% OF WHICH HAS A GRAIN DIAMETER OF LESS THAN 0.06 MM., POWDER HAVING A BULK WEIGHT OF UP TO 1.5 GRAMS PER CUBIC CENTIMETER; SINTERING SAID MASS IN A REDUCING ATMOSPHERE AT A TEMPERATURE OF BETWEEN ABOUT 800O C. AND 1000O C. FOR A PERIOD OF BETWEEN ABOUT ONEHALF AND TWO HOURS SO AS TO TRANSFORM THE SAME INTO A HIGHLY POROUS PLATE CONSISTING ESSENTIALLY OF A HOMOGENEOUS ALLOY OF COPPER AND NICKEL; AND AT LEAST PARTIALFILLING THE PORES OF THE THUS FORMED PLATE WITH ACTIVE MASS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |