US3573993A
Expired / Lapsed
US
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Oxygen electrode composed of mixed oxides of praseodymium,chromium,nickel and cobalt
Assignee: Robert Bosch GmbH
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Filing: 1968-12-04
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Granted: 1971-04-06
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Expires: 1988-12-04
Abstract
Abstract OXYGEN ELECTRODE SUITABLE AS CATHODE IN FUEL CELLS. MIXED OXIDES OF PRASEODYMIUM, CHROMIUM, NICKEL AND/OR COBALT ARE LODGED IN SPACES FORMED ON THE SURFACE OF THE SOLID ELECTRODE MATERIAL AND THE ELECTRICAL CONDUCTOR OF THE ELECTRODE IS MADE OF HEAT RESISTANT STEEL.
Inventors
- 👤 Wilfried Pabst
- 👤 Gerd Sandstede
- 👤 Gerhard Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:07
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; H01M4/8647; H01M4/8652; H01M4/9025; H01M2004/8678; H01M2004/8689; H01M8/00; H01M8/10; H01M8/12; H01M2008/1293; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0068; H01M2300/0071; H01M2300/0074; 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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |