US3821028A
Expired / Lapsed
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Fuel cell with metal chelate electrode catalyst
Assignee: Robert Bosch GmbH
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Filing: 1972-06-07
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Granted: 1974-06-28
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Expires: 1992-06-07
Abstract
Abstract A catalyst for fuel cell electrodes wherein a gaseous fuel or a fuel dissolved in the electrolyte of the cell is subjected to anodic oxidation, comprises a metal chelate of 5, 14-dihydrodibenzo(5,9,14,18) tetraaza(14)-annulene or an electrochemical oxidation product thereof. The catalyst permits formation of electrodes which can be operated with an acidic electrolyte and comparatively inexpensive fuel, such as methanol, formaldehyde, formic acid, carbon monoxide, oxalic acid, etc.
Inventors
- 👤 H Ziener
- 👤 H Magenau
- 👤 G Zimmermann
- 👤 L Weber
- 👤 H Jahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:27
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9008; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
In a fuel cell as defined in claim 1, wherein said metal chelates comprise cobalt as the central atom.
Claim 2
Dependent Claim
19 words
In a fuel cell as defined in claim 1, wherein said metal chelates comprise iron as the central atom.
Claim 3
Dependent Claim
19 words
In a fuel cell as defined in claim 1, wherein said metal chelates comprise copper as the central atom.
Claim 4
Dependent Claim
16 words
In a fuel cell as defined in claim 1, wherein said electrolyte is an acidic electrolyte.
Claim 5
Dependent Claim
15 words
In a fuel cell as defined in claim 5, wherein said electrolyte comprises sulfuric acid.
Claim 6
Dependent Claim
31 words
In a fuel cell as defined in claim 1, wherein the fuel includes a substance selected from the group consisting of formaldehyde, formic acid, oxalic acid, carbon monoxide and hydrazine hydrate.
Claim 7
Dependent Claim
32 words
In a fuel cell as defined in claim 1, wherein the fuel includes a substance selected from the group consisting of formic acid and carbon monoxide, and said electrolyte comprises potassium hydroxide.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |