Patent US1939392A successfully refreshed from Google Patents.
US4052286A
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Solid sensor electrode
Assignee: OI Glass Inc
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Filing: 1973-01-31
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Granted: 1977-10-04
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Expires: 1993-01-31
Abstract
Abstract A noble metal-glass composite is screen printed on an inert substrate such as a low alkali glass and fired to provide a solid sensor electrode.
Inventors
- 👤 Don N. Gray
- 👤 George G. Guilbault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:41
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
In a sensor electrode having a noble metal sensing surface adapted for direct contact with a test specimen, the improvement wherein said sensing surface comprises the composite, solid-state, fusion product of a mixture of noble metal powder and powdered glass, fused to an inert substrate.
Claim 2
Dependent Claim
45 words
In a sensor electrode having a noble metal sensing surface adapted for direct contact with a test specimen, the improvement wherein said sensing surface comprises the composite, solid-state, fusion product of a mixture of noble metal powder and powdered glass, fused to an inert substrate.
Claim 3
Dependent Claim
25 words
An electrode according to claim 1 wherein said composite comprises about from 50% to 99% by weight of noble metal, the balance consisting of glass.
Claim 4
Dependent Claim
19 words
An electrode according to claim 1 wherein said noble metal is gold, silver, platinum, palladium or a mixture thereof.
Claim 5
Dependent Claim
11 words
An electrode according to claim 1 wherein said substrate is glass.
Claim 6
Dependent Claim
14 words
An electrode according to claim 1 wherein said substrate is a low alkali glass.
Claim 7
Dependent Claim
26 words
An electrode according to claim 1 wherein said substrate contains about 44.9% SIO 2 , 19.0% Al 2 O 3 , 15.1% MgO and 21.0% CaO.
Claim 8
Dependent Claim
13 words
An electrode according to claim 1 wherein said substrate is a plastic material.
Claim 9
Dependent Claim
11 words
An electrode according to claim 1 wherein said substrate is alumina.
Claim 10
Dependent Claim
18 words
An electrode according to claim 1 wherein the glass present in said composite is a low alkali glass.
References Cited (Backward Citations)
GB1081545A
Cited
US3700577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |