US5041159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous nickel plaque fabrication
Assignee: Fuelcell Energy Inc
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Filing: 1989-02-13
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Granted: 1991-08-20
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Expires: 2009-02-13
Abstract
Abstract An improved method of forming a nickel plaque wherein an assemblage of particles of a nickel alloy are oxidized and sintered in a preselected atmosphere such that the alloying material is exclusively substantially internally oxidized and the resultant product sintered to provide a sintered porous plaque containing nickel metal and oxidized alloying material.
Inventors
- 👤 Joel D. Doyon
- 👤 Lawrence M. Paetsch
- 👤 Mark Benedict
- 👤 D. Lynn Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:11
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8875; B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1143; C; C22; C22C; C22C1/00; C22C1/10; C22C1/1078; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; H01M4/8605; H01M4/8621; H01M4/8878; H01M4/8882; H01M4/8885; H01M4/90; H01M4/9041; B22F2998/00; H01M2004/8678; H01M2004/8684; H01M8/00; H01M8/14; H01M2008/147; H01M2300/00; H01M2300/0017; H01M2300/0048; H01M2300/0051; H01M4/8647; H01M4/8652; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
81 words
A method of forming a porous nickel plaque comprising the steps of: assembling particles of nickel alloy material; simultaneously oxidizing and sintering the assembled particles in a preselected atmosphere comprised of a mixture of water and hydrogen such that the alloying material is exclusively substantially internally oxidized, and the resultant product sintered, whereby a sintered porous plaque is formed containing nickel metal and oxidized alloying material; said method including no oxidizing steps which result in the oxidation of said nickel metal.
Claim 2
Independent Claim
81 words
A method of forming a porous nickel plaque comprising the steps of: assembling particles of nickel alloy material; simultaneously oxidizing and sintering the assembled particles in a preselected atmosphere comprised of a mixture of water and hydrogen such that the alloying material is exclusively substantially internally oxidized, and the resultant product sintered, whereby a sintered porous plaque is formed containing nickel metal and oxidized alloying material; said method including no oxidizing steps which result in the oxidation of said nickel metal.
Claim 3
Dependent Claim
33 words
A method in accordance with claim 1 wherein: said atmosphere comprises a mixture of water and hydrogen in amounts to provide a preselected ratio of the partial pressures of said water and hydrogen.
Claim 4
Dependent Claim
18 words
A method in accordance with claim 2 wherein: said ratio is in the range of 25:1 to 110:1.
Claim 5
Dependent Claim
14 words
A method in accordance with claim 3 wherein: said ratio is 100 to 1.
Claim 6
Dependent Claim
12 words
A method in accordance with claim 3 wherein: said atmosphere includes nitrogen.
Claim 7
Dependent Claim
42 words
A method in accordance with claim 1 wherein: said oxidizing and sintering step is carried out at a temperature in the range of 800 ° C. to 1100 ° C. and for a time in the range of 1 to 10 hours.
Claim 8
Dependent Claim
20 words
A method in accordance with claim 6 wherein: said temperature is 1000 ° C. and said time is 10 hours.
Claim 9
Dependent Claim
20 words
A method in accordance with claim 1 wherein: said step of assembling includes tape casting a slurry of said particles.
Claim 10
Dependent Claim
19 words
A method in accordance with claim 1 wherein: said step of assembling includes forming a bed of said particles.
Claim 11
Dependent Claim
13 words
A method in accordance with claim 1 wherein: said plaque is an electrode.
Claim 12
Dependent Claim
14 words
A method in accordance with claim 10 wherein: said electrode is an anode electrode.
Claim 13
Dependent Claim
15 words
A porous nickel plaque made by the method of any one of the claims 1-11.
Claim 14
Independent Claim
83 words
A method of forming a porous nickel plaque comprising the steps of: assembling particles of nickel alloy material; simultaneously oxidizing and sintering the assembled particles in a preselected atmosphere comprised of a mixture of carbon dioxide and carbon monoxide such that the alloying material is exclusively substantially internally oxidized, and the resultant product sintered, whereby a sintered porous plaque is formed containing nickel metal and oxidized alloying material; said method including no oxidizing steps which result in the oxidation of said nickel metal.
Claim 15
Independent Claim
83 words
A method of forming a porous nickel plaque comprising the steps of: assembling particles of nickel alloy material; simultaneously oxidizing and sintering the assembled particles in a preselected atmosphere comprised of a mixture of carbon dioxide and carbon monoxide such that the alloying material is exclusively substantially internally oxidized, and the resultant product sintered, whereby a sintered porous plaque is formed containing nickel metal and oxidized alloying material; said method including no oxidizing steps which result in the oxidation of said nickel metal.
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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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |