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US2471781A
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Electric accumulator of the bipolar type
Assignee: ABB Norden Holding AB
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Filing: 1944-09-19
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Granted: 1949-05-31
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Expires: 1964-09-19
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Wilhelm Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/18; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553596A
Cited
US618247A
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US650886A
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US1075897A
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GB193241A
Cited
US1584248A
Cited
US1766026A
Cited
GB422921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |