US3471394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salt bridge reference electrode
Assignee: Pennwalt Corp
•
Filing: 1966-12-23
•
Granted: 1969-10-07
•
Expires: 1986-12-23
Abstract
No abstract record available.
Inventors
- 👤 Leon P Sudrabin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/301
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2706710A
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US2930967A
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US2886771A
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US3000804A
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US3065151A
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US3126328A
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US3119754A
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GB958422A
Cited
US3281348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |