Patent EP0031033A1 successfully refreshed from Google Patents.
US5021137A
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US
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Ceramic solid electrolyte based electrochemical oxygen concentrator cell
Assignee: Ceramatec Inc
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Filing: 1989-11-06
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Granted: 1991-06-04
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Expires: 2009-11-06
Abstract
Abstract The invention is a ceramic solid electrolyte based electrochemical oxygen concentrator cell and the method for fabricating said cell. The cell is based on a doped cerium oxide ceramic solid electrolyte and lanthanum strontium cobaltite ceramic electrodes.
Inventors
- 👤 Ashok V. Joshi
- 👤 Mustafa B. Syammach
- 👤 Scott S. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:08
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4073; C; C25; C25B; C25B1/00; C25B1/01; C25B1/02; C25B9/00; C25B9/17
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
An electrolyte assembly for an electrochemical oxygen generating device consisting essentially of: an electrolyte comprising ceria; a pair of substantially continuous, porous, substantially sintered thin electrodes comprising lanthanum strontium cobaltite contacting said electrolyte; and an overcoat of a thin, continuous, substantially non-porous layer of silver over each of said electrodes.
Claim 2
Dependent Claim
50 words
An electrolyte assembly for an electrochemical oxygen generating device consisting essentially of: an electrolyte comprising ceria; a pair of substantially continuous, porous, substantially sintered thin electrodes comprising lanthanum strontium cobaltite contacting said electrolyte; and an overcoat of a thin, continuous, substantially non-porous layer of silver over each of said electrodes.
Claim 3
Dependent Claim
26 words
The electrolyte assembly of claim 1 wherein said ceria is doped with an oxide selected from the class of calcium oxide, strontium oxide and yttrium oxide.
Claim 4
Dependent Claim
18 words
The electrolyte assembly of claim 1 wherein said electrodes are about 20 to about 200 microns in thickness.
Claim 5
Dependent Claim
18 words
The electrolyte assembly of claim 1 wherein said electrodes are about 70 to about 130 microns in thickness.
Claim 6
Dependent Claim
19 words
The electrolyte assembly of claim 1 wherein said silver layer is about 5 to about 15 microns in thickness.
Claim 7
Dependent Claim
15 words
The electrolyte assembly of claim 1 wherein said electrodes contain a minor quantity of ceria.
Claim 8
Dependent Claim
25 words
The electrodes of claim 1 wherein said lanthanum strontium cobaltite has the composition lanthanum oxide 0.10-0.40 moles, strontium oxide 0.20-0.80 moles, cobalt oxide 1.0 mole.
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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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |