US3136871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive liquid level control
Assignee: Individual
•
Filing: 1961-09-26
•
Granted: 1964-06-09
•
Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 John R Barletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:51
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/18; G01F23/185; G05; G05D; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2398375A
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US2536089A
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US2486785A
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US2621268A
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US2697196A
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US2797702A
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US2935582A
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US2979583A
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US3045704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |