US3576677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell process air control
Assignee: RTX Corp
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Filing: 1969-10-09
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Granted: 1971-04-27
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Expires: 1989-10-09
Abstract
Abstract THE AIR SUPPLY WHICH PROVIDES OXYGEN TO THE CATHODE OF A FUEL CELL UTILIZING AN AQUEOUS POTASSIUM HYDROXIDE ELECTROLYTE INCLUDES A CONSTANT VOLUME OUTPUT PUMP WHICH IS FED BY A PORTION OF THE PARTIALLY EXPENDED AIR EXHAUSTING FROM THE CATHODE AND ALSO DRAWS AIR FROM TTHE ATMOSPHERE THROUGH A VALVE WHICH INCREASES ATMOSPHERIC AIR FLOW IN RESPONSE TO INCREASING FUEL CELL POWERPLANT LOAD CURRENT, THERBY TO PROVIDE INCREASED OXYGEN CONTENT AND DECREASED WATER VAPOR PRESSUE TO THE PROCESS AIR IN RESPONSE TO INCREASING CURRENT LOADS.
Inventors
- 👤 Stephen J Keating Jr
- 👤 Richard D Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:42
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04007; H01M8/04029; H01M8/04082; H01M8/04089; H01M8/04097; H01M8/06; H01M8/0662; H01M2250/00; H01M2250/40; H01M2250/405; H01M8/04014; H01M8/04119; Y; Y02; Y02B; Y02B90/00; Y02B90/10; 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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |