US3778313A
Expired / Lapsed
US
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Method of making an oxygen electrode for fuel cells
Assignee: Robert Bosch GmbH
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Filing: 1971-03-03
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Granted: 1973-12-11
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Expires: 1991-03-03
Abstract
Abstract THE OXYGEN ELECTRODE FOR USE IN A FUEL CELL IS FORMED BY DISSOLVING 10 TO 30 PARTS BY WEIGHT OF A METAL PHTHALOCYANINE IN CONCENTRATED SULFURIC ACID, ADDING 10 TO 40 PARTS OF A FINELY DIVIDED CONDUCTING MATERIAL AND CAUSING PRECIPITATION OF THE SOLUTE ONTO THE CONDUCTIVE MATERIAL, DRYING THE MASS AND MIXING IT WAS 5 TO 20 PARTS OF A BINDER AND 20 TO 70 PARTS OF A PORE-FORMING MATERIAL AND SUBJECTING THE DRY MIXTURE TO HEAT AND PRESSURE FOLLOWED BY REMOVAL OF THE PORE-FORMING MATERIAL. THE ELECTRODE IS ACID RESISTANT AND CAN THEREFORE BE USED IN FUEL CELLS OPERATED WITH ACIDIC ELECTROLYTES.
Inventors
- 👤 H Reber
- 👤 H Jahnke
- 👤 W Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:47
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |