US3716412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric storage batteries
Assignee: Electric Power Storage Ltd
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Filing: 1971-02-19
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Granted: 1973-02-13
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Expires: 1991-02-19
Abstract
Abstract A LEAD ACID BATTERY HAVING AN IMPROVED ACID ELECTROLYTE IS DISCLOSED. THE ELECTROLYTE IN THE BATTERY CONTAINS NOT MORE THAN 75 GRAMS OF AMORRPHOUS SILICA (CALCULATED AS SIO2) PER LITRE OF ELECTROLYTE WHEREBY THE RESISTANCE TO SHEDDING OF ACTIVE MATERIAL FROM THE POSITIVE ELECTRODE OF THE BATTERY IS ENHANCED.
Inventors
- 👤 K Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:42
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/08; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |