US3592694A
Expired / Lapsed
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Hydrazine fuel cell control system
Assignee: United States Department of the Navy
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Filing: 1968-09-16
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Granted: 1971-07-13
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Expires: 1988-09-16
Abstract
Abstract APPARATUS FOR CONTROLLING HYDRAZINE CONCENTRATION IN FUEL CELLS. A HYDRAZINE SENSOR COMPRISES AN ELONGATED POROUS ANODE, GUARDED FROM THE CATHODE BY A POROUS SEPARATOR TO PREVENT CATHODE GAS FROM CONTACTING THE ANODE. THE CURRENT OUTPUT OF THE SENSOR IS FED INTO A COMPARATOR THEN INTO A HYDRAZINE-FEEDING SYSTEM WHICH DELIVERS FUEL TO THE FUEL CELL.
Inventors
- 👤 Herman B Urbach
- 👤 Robert E Smith
- 👤 Robert J Bowen
- 👤 David E Icenhower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04298; H01M8/04313; H01M8/0444; H01M8/04447; H01M8/04082; H01M8/04186; H01M8/04194; H01M8/04694; H01M8/04746; H01M8/04753; H01M8/04791; H01M8/0482; H01M8/22; H01M8/222; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |