US3522098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cells with device for reducing electrolyte short-circuit currents
Assignee: Siemens AG
•
Filing: 1967-06-20
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Granted: 1970-07-28
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Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand V Sturm
- 👤 Herbert Cnobloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:47
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)
DE206350C
Cited
US2925455A
Cited
US3080442A
Cited
US3256116A
Cited
US3215562A
Cited
US3375139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |