Patent US3279949A successfully refreshed from Google Patents.
US3279949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell half-cell containing vanadium redox couple
Assignee: Union Carbide Corp
•
Filing: 1961-07-27
•
Granted: 1966-10-18
•
Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Hugh F Schaefer
- 👤 Karl V Kordesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:47
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/18; H01M8/184; H01M8/188; H01M8/20; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A FUEL CELL HALF-CELL COMPRISING AN ACTIVATED POROUS CARBON GAS ELECTRODE, A STRONGLY ACIDIC INORGANIC ELECTROLYTE, AND IN SAID ELECTROLYTE A REDOX COUPLE CONSISTING OF VANADATE IONS AND VANADYL IONS.
Claim 2
Dependent Claim
30 words
A FUEL CELL HALF-CELL COMPRISING AN ACTIVATED POROUS CARBON GAS ELECTRODE, A STRONGLY ACIDIC INORGANIC ELECTROLYTE, AND IN SAID ELECTROLYTE A REDOX COUPLE CONSISTING OF VANADATE IONS AND VANADYL IONS.
References Cited (Backward Citations)
US2901522A
Cited
GB761948A
Cited
US3000996A
Cited
US2897249A
Cited
US3032600A
Cited
US3152013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |