US4170531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an oxygen concentration cell
Assignee: NGK Insulators Ltd
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Filing: 1978-01-26
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Granted: 1979-10-09
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Expires: 1998-01-26
Abstract
Abstract A simple method of producing an oxygen concentration cell provided with durable electrodes having a high activity and a low internal resistance is disclosed. The method comprises applying a solution of a compound of platinum group metal to an oxygen ion conductive solid electrolyte, converting the compound into an insoluble or hardly soluble compound by a chemical reaction, and thermally decomposing the insoluble or hardly soluble compound into the platinum group metal to be used as the electrodes of the cell.
Inventors
- 👤 Tetsuo Watanabe
- 👤 Shigetaka Wada
- 👤 Shunzo Mase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:00
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9041; H01M4/905; H01M4/9058; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
A method of producing an oxygen concentration cell, comprising applying a solution of a compound a platinum group metal to an oxygen on conductive solid electrolyte, converting the compound of platinum group metal into an insoluble or hardly soluble compound by contacting the applied solution with ammonia or amine in the gaseous or liquid state, and thermally decomposing the insoble or hardly soluble compound into the platinum group metal to be used as the electrodes of the cell.
Claim 2
Independent Claim
78 words
A method of producing an oxygen concentration cell, comprising applying a solution of a compound a platinum group metal to an oxygen on conductive solid electrolyte, converting the compound of platinum group metal into an insoluble or hardly soluble compound by contacting the applied solution with ammonia or amine in the gaseous or liquid state, and thermally decomposing the insoble or hardly soluble compound into the platinum group metal to be used as the electrodes of the cell.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein said solution of a compound of platinum group metal is an aqueous solution of platinum tetrachloride or hexachloroplatinic acid.
References Cited (Backward Citations)
US3978006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |