US3524769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for interrupting short-circuit currents in fuel-cell batteries
Assignee: Siemens AG
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Filing: 1968-06-28
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Granted: 1970-08-18
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Expires: 1988-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand V Sturm
- 👤 Herbert Nischik
- 👤 Manfredo Marchetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:57
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04276; H01M50/00; H01M50/70; H01M50/77; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |