US3189922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-buoyancy floats
Assignee: Electricite de France SA
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Filing: 1964-01-02
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Granted: 1965-06-22
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Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 Margot Jean
- 👤 Grivory Gabriel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:27
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/12; F16L1/20; F16L1/24; B; B63; B63B; B63B22/00; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; B63B2207/00; B63B2207/02; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/305; F15B2201/40; F15B2201/41; F15B2201/411; F15B2201/415; F15B2201/4155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A VARIABLE-BUOYANCY FLOAT COMPRISING: (A) A CLOSED HOLLOW RIGID TANK COMPRISING A FILLING VALVE DISPOSED ON ITS SURFACE AND A WATER ORIFICE FORMED WITH A VALVE-SEATING AND DISPOSED IN THE LOWEST PORTION OF ITS SURFACE; (B) A QUANTITY OF LIGHTER THAN WATER LIQUID FILLING THE LOWER PART OF THE HOLLOW INTERIOR OF SAID TANK; (C) A QUANTITY OF GAS FILLING THE REMAINDER OF THE HOLLOW INTERIOR OF SAID TANK; AND (D) A VALVE FOR CONTROLLING THE OPENING AND CLOSING OF SAID WATER ORIFICE SO AS TO PERMIT EXTERNAL WATER TO ENTER SAID TANK WHEN THE PRESSURE OF SAID EXTERNAL WATER EXCEEDS THAT OF SAID GAS.
Claim 2
Dependent Claim
105 words
A VARIABLE-BUOYANCY FLOAT COMPRISING: (A) A CLOSED HOLLOW RIGID TANK COMPRISING A FILLING VALVE DISPOSED ON ITS SURFACE AND A WATER ORIFICE FORMED WITH A VALVE-SEATING AND DISPOSED IN THE LOWEST PORTION OF ITS SURFACE; (B) A QUANTITY OF LIGHTER THAN WATER LIQUID FILLING THE LOWER PART OF THE HOLLOW INTERIOR OF SAID TANK; (C) A QUANTITY OF GAS FILLING THE REMAINDER OF THE HOLLOW INTERIOR OF SAID TANK; AND (D) A VALVE FOR CONTROLLING THE OPENING AND CLOSING OF SAID WATER ORIFICE SO AS TO PERMIT EXTERNAL WATER TO ENTER SAID TANK WHEN THE PRESSURE OF SAID EXTERNAL WATER EXCEEDS THAT OF SAID GAS.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |