Patent US3097659A successfully refreshed from Google Patents.
US3097659A
Expired / Lapsed
US
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Water tank pressurizing system
Assignee: Individual
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Filing: 1961-05-08
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Granted: 1963-07-16
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Bert S Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:49
CPC Classifications
E; E03; E03B; E03B11/00; E03B11/02; Y; Y02; Y02A; Y02A20/00; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/3137
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A LIQUID TANK PRESSURIZING SYSTEM, COMPRISING A MAIN CLOSED TANK CONTAINING LIQUID AND AN AIR SPACE ABOVE THE LIQUID, A RELATIVELY SMALL PRESSURIZING VESSEL, MEANS MOUNTING SAID VESSEL FOR COUNTERBALANCED UP AND DOWN MOVEMENTS IN A RANGE OF TRAVEL BELOW THE LIQUID LEVEL IN THE TANK AND IN RESPONSE TO INTRODUCTION TO AND REMOVAL OF LIQUID FROM THE VESSEL, A RETURN LINE RECEIVING LIQUID FROM A LOWER ELEVATION REGION OF THE TANK FOR DELIVERING TO SAID VESSEL LIQUID WHICH IS PRESSURIZED BY THE AIR IN SAID TANK SPACE AND BY THE WEIGHT OF THE TANK LIQUID ABOVE SAID LOWER ELEVATION REGION, SAID TANK HAVING A LIQUID INLET AND ALSO A LIQUID SUPPLY OUTLET WHICH IS AT A LOWER ELEVATION, A CONDUIT THROUGH WHICH AIR IS DISPLACED FROM SAID VESSEL INTO THE TANK AS LIQUID IS DELIVERED INTO THE VESSEL, A VALVE-
Claim 2
Dependent Claim
141 words
A LIQUID TANK PRESSURIZING SYSTEM, COMPRISING A MAIN CLOSED TANK CONTAINING LIQUID AND AN AIR SPACE ABOVE THE LIQUID, A RELATIVELY SMALL PRESSURIZING VESSEL, MEANS MOUNTING SAID VESSEL FOR COUNTERBALANCED UP AND DOWN MOVEMENTS IN A RANGE OF TRAVEL BELOW THE LIQUID LEVEL IN THE TANK AND IN RESPONSE TO INTRODUCTION TO AND REMOVAL OF LIQUID FROM THE VESSEL, A RETURN LINE RECEIVING LIQUID FROM A LOWER ELEVATION REGION OF THE TANK FOR DELIVERING TO SAID VESSEL LIQUID WHICH IS PRESSURIZED BY THE AIR IN SAID TANK SPACE AND BY THE WEIGHT OF THE TANK LIQUID ABOVE SAID LOWER ELEVATION REGION, SAID TANK HAVING A LIQUID INLET AND ALSO A LIQUID SUPPLY OUTLET WHICH IS AT A LOWER ELEVATION, A CONDUIT THROUGH WHICH AIR IS DISPLACED FROM SAID VESSEL INTO THE TANK AS LIQUID IS DELIVERED INTO THE VESSEL, A VALVE-
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) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |