Patent US2662404A successfully refreshed from Google Patents.
US2662404A
Expired / Lapsed
US
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System responsive to liquid levels
Assignee: Individual
•
Filing: 1946-05-11
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Granted: 1953-12-15
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Expires: 1966-05-11
Abstract
No abstract record available.
Inventors
- 👤 Carl G Sontheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:06
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605171A
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US1622794A
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US2129617A
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US2201974A
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US2354847A
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US2347637A
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US2382695A
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US2434098A
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US2459542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |