US3479224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for continuous removal of reaction water from a fuel cell
Assignee: Siemens AG
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Filing: 1965-06-29
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Granted: 1969-11-18
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Expires: 1985-06-29
Abstract
No abstract record available.
Inventors
- 👤 Philipp Jager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:01
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04082; H01M8/04089; H01M8/04119; H01M8/04156; H01M8/04097; Y; Y02; Y02E; Y02E60/00; 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) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |