Patent US3414439A successfully refreshed from Google Patents.
US3414439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell and process of using with ruthenium-tantalum alloy catalyst
Assignee: BASF Catalysts LLC
•
Filing: 1967-03-13
•
Granted: 1968-12-03
•
Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Otto J Adlhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/92; H01M4/928; H01M4/925; H01M4/926; H01M2004/8678; H01M2004/8684; H01M2300/00; H01M2300/0002; H01M2300/0005; H01M2300/0011; H01M2300/0017; H01M2300/0065; H01M2300/0082; 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)
US2719797A
Cited
US3134697A
Cited
US3280014A
Cited
US3147203A
Cited
US3152015A
Cited
US3279950A
Cited
US3274031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |