US3507705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid electrolyte fuel-cell battery
Assignee: Compagnie Francaise de Raffinage SA
•
Filing: 1968-09-03
•
Granted: 1970-04-21
•
Expires: 1988-09-03
Abstract
No abstract record available.
Inventors
- 👤 Helmut Tannenberger
- 👤 Herbert Schachner
- 👤 Wolfgang Simm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:39
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; H01M8/1231; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3460991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |