Patent US3181558A successfully refreshed from Google Patents.
US3181558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control for livestock watering troughs
Assignee: Individual
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Filing: 1962-11-21
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Granted: 1965-05-04
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Straub Martha Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
A; A01; A01K; A01K7/00; A01K7/02; A01K7/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7452; Y10T137/8593; Y10T137/86236; Y10T137/86252; Y10T137/8807; Y10T137/88078
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A LIQUID LEVEL CONTROL DEVICE COMPRISING AN ELONGATED TUBULAR BODY HAVING AN INLET END SECTION FOR CONNECTION TO A LIQUID SUPPLY CONDUIT AND AN OUTER BUOYANT END SECTION ADAPTED TO FLOAT IN A BODY OF LIQUID WHOSE LEVEL IS TO BE CONTROLLED BY SAID DEVICE, THE INLET END SECTION OF SAID BODY INCLUDING A RESILIENTLY FLEXIBLE OUTER CASING AND AN INTERNAL, NORMALLY CLOSED VALVE MEANS ARRANGED FOR MOVEMENT, TO AN OPEN POSITION IN RESPONSE TO A DOWNWARD FLEXING OF SAID CASING, THE OUTER BUOYANT END SECTION OF SAID BODY BEING PROVIDED WITH A DISCHARGE OUTLET AND HAVING A WEIGHT SUFFICIENT TO FLEX SAID CASING DOWNWARDLY TO OPEN SAID VALVE MEANS WHEN SAID OUTER BUOYANT END SECTION OCCUPIES A POSITION SUBSTANTIALLY BELOW THE INLET END SECTION OF SAID BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-03 | 1968-11-02 | 1969-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-03 | 1972-11-02 | 1973-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-03 | 1976-11-02 | 1977-05-04 | $7700.00 | Window Closed / Lapsed |