Patent US3554811A successfully refreshed from Google Patents.
US3554811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide cathode material for primary fuel cells for high temperatures
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1967-10-09
•
Granted: 1971-01-12
•
Expires: 1987-10-09
Abstract
Abstract AN OXIDE CATHODE MATERIAL FOR PRIMARY FUEL CELLS WITH OXYGEN-ION-CONDUCTING MIXED-OXIDE SOLID ELECTROLYTES WORKING AT HIGH TEMPERATURES WITH GASEOUS OXIDANTS. THE MATERIAL CONSISTS IN INDIUM OXIDE DOPED WITH GALLIUM OXIDE AND/OR ZINC OXIDE, AND THE QUANTITY OF THESE LATTER TWO OXIDES IN THE INDIUM OXIDE IS BETWEEN 0 AND 30% BY WEIGHT.
Inventors
- 👤 Arnold Isenberg
- 👤 Wilfried Pabst
- 👤 Gerd Sandstede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:34
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; H01M4/9025; 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)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |