US3709736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell system comprising noncirculating,counter-current gas flow means
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1970-08-17
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Granted: 1973-01-09
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Expires: 1990-08-17
Abstract
Abstract IN AN AIR-BREATHING FUEL CELL STACK UTILIZING A STABLE ACID ELECTROLYTE AND ELECTRICALLY AND THERMALLY CONDUCTIVELY PLATES BETWEEN THE INDIVIDUAL CELLS, THE AIR SWEP SIMULTANEOUSLY SUPPLIES OXIDANT AND MAINTAINS THE TEMPERATURE AND WATER BALANCE IN THE CELL. THE TRIPLE FUNCTION CONTROL BY AIR FLOW IS MADE POSSIBLE BY VIRTUE OF A COMBINATION OF THE PARTICULAR TYPE OF ELECTROLYTE AND BY AN IMPROVED ARRANGEMENT OF AIR FEED TO THE CELLS. D R A W I N G
Inventors
- 👤 O Adlhart
- 👤 P Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:46
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/24; H01M8/2465; H01M8/2484; H01M8/2485; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |