Patent US3607416A successfully refreshed from Google Patents.
US3607416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinel-type electrodes, process of making and fuel cell
Assignee: RTX Corp
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Filing: 1967-02-20
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Granted: 1971-09-21
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Expires: 1987-02-20
Abstract
Abstract A process of forming a fuel cell electrode comprised of a nickel oxide-cobalt oxide spinel surface is disclosed. The process consists of first forming a nickel oxide layer on a substrate, then impregnating it with a solution of a cobalt salt and subsequently oxidizing the impregnated substrate to form the mixed oxide spinel-type electrode.
Inventors
- 👤 John H Sizer Jr
- 👤 Jose D Giner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:27
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8878; H01M4/8892; H01M4/8647; H01M4/8657; H01M2300/00; H01M2300/0002; H01M2300/0014; H01M2300/0017; H01M2300/0048; H01M2300/006; H01M4/90; H01M4/9016; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
The process of claim 1 in which the electrode is dried at a temperature of up to about 180* C. after the cobalt impregnation step and before oxidation of the impregnated electrode.
Claim 2
Dependent Claim
21 words
The process of claim 1 in which the initial oxidation step is carried out on a green, uncoated porous nickel electrode.
Claim 3
Dependent Claim
20 words
The process of claim 3 in which the cobalt salt is sued to impregnate the oxidized electrode is cobalt nitrate.
Claim 4
Dependent Claim
36 words
The process of claim 4 is which the initial oxidation step is carried out at a temperature of about 600* C. and the second oxidation step is carried out at a temperature of about 500* C.
Claim 5
Dependent Claim
20 words
The process of claim 3 in which the cobalt solution contains about 2 to 10 percent by weight of cobalt.
Claim 6
Dependent Claim
25 words
The process of claim 1 in which the porous nickel electrode is impregnated with a solution of lithium salt prior to the initial oxidation step.
Claim 7
Dependent Claim
30 words
The process of claim 7 in which the first oxidation step is carried out at about 650* C. and the second oxidation step is carried out at about 500* C.
Claim 8
Dependent Claim
20 words
The process of claim 7 in which the cobalt salt is used in the second impregnation step is cobalt nitrate.
Claim 9
Dependent Claim
21 words
The process of claim 7 in which the cobalt impregnating solution contains about 5 to 10 percent by weight of cobalt.
Claim 10
Dependent Claim
15 words
The process of claim 1 in which the porous nickel electrode is a biporous electrode.
Claim 11
Dependent Claim
24 words
An oxidation resistant and stable-operating porous nickel fuel cell electrode having a nickel oxide-cobalt oxide spinel-type surface produced by the process of claim 1.
Claim 12
Dependent Claim
24 words
An oxidation resistant and stable-operating biporous nickel fuel cell electrode having a nickel oxide-cobalt oxide spinel-type surface produced by the process of claim 11.
Claim 13
Dependent Claim
33 words
An intermediate temperature Bacon-type fuel cell comprising a housing, an alkaline electrolyte, an anode, and a porous nickel cathode having a nickel oxide-coblat oxide spinel-type surface produced by the process of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |