US2578276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit closer for high-low alarms
Assignee: Yarnall Waring Co
•
Filing: 1947-06-20
•
Granted: 1951-12-11
•
Expires: 1967-06-20
Abstract
No abstract record available.
Inventors
- 👤 Yarnall David Robert
- 👤 James W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:42
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1529470A
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DE576685C
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FR720957A
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US2109953A
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US2245596A
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US2319010A
Cited
US2307304A
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US2419942A
Cited
US2459930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |