US2658970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level actuated switch
Assignee: JERROLD L LANSBERRY
•
Filing: 1951-10-23
•
Granted: 1953-11-10
•
Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Earl H Hurley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/02; G; G01; G01F; G01F23/00; G01F23/30; G01F23/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US355815A
Cited
US2448251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |