US3645875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode assembly
Assignee: Elster Metering Holdings Ltd
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Filing: 1968-11-21
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Granted: 1972-02-29
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Expires: 1988-11-21
Abstract
Abstract An electrode assembly, particularly for use at high temperatures, comprises a non-porous refractory base with metal electrode layers, of platinum for example, on opposed sides, at least one of which has a complete or discontinuous refractory overlayer for exposure to hot gases or liquids. The overlayer is porous where the electrode completely encapsulated but need not be where portions, preferably edge portions, are exposed. The base may be constituted as a tube or as the closed end of a tube. The refractory material may be yttria stabilised thoria or lime stabilised zirconium oxide.
Inventors
- 👤 Robert George Hamilton Record
- 👤 Derck Austen Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:29
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4077; 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: 0
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |