Patent US3128784A successfully refreshed from Google Patents.
US3128784A
Expired / Lapsed
US
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Wide range liquid level control devices
Assignee: Delaware Capital Formation Inc
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Filing: 1961-08-04
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Granted: 1964-04-14
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Expires: 1981-08-04
Abstract
No abstract record available.
Inventors
- 👤 Asbury S Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:34
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7407; Y10T137/7413; Y10T137/7439
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A LIQUID LEVEL CONTROL DEVICE INCLUDING, A HOUSING, A TUBULAR FLOAT SUPPORT ARM HAVING ONE END PIVOTALLY MOUNTED WITHIN SAID HOUSING AND ITS OTHER END PROJECTING INTO AN AREA IN WHICH LIQUID LEVEL IS TO BE CONTROLLED, A FLOAT ELEMENT RESPONSIVE TO CHANGES IN LIQUID LEVEL AND DISPOSED IN SAID AREA, A FLEXIBLE LINE HAVING ONE END ATTACHED TO THE FLOAT ELEMENT AND EXTENDING UPWARDLY TO AND THROUGH THE TUBULAR FLOAT SUPPORT ARM, THE OPPO-
Claim 2
Dependent Claim
75 words
A LIQUID LEVEL CONTROL DEVICE INCLUDING, A HOUSING, A TUBULAR FLOAT SUPPORT ARM HAVING ONE END PIVOTALLY MOUNTED WITHIN SAID HOUSING AND ITS OTHER END PROJECTING INTO AN AREA IN WHICH LIQUID LEVEL IS TO BE CONTROLLED, A FLOAT ELEMENT RESPONSIVE TO CHANGES IN LIQUID LEVEL AND DISPOSED IN SAID AREA, A FLEXIBLE LINE HAVING ONE END ATTACHED TO THE FLOAT ELEMENT AND EXTENDING UPWARDLY TO AND THROUGH THE TUBULAR FLOAT SUPPORT ARM, THE OPPO-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |