US3260054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing excavations in water-bearing ground
Assignee: ENTREPRISES LEON CHAGNAUD AND FILS
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Filing: 1963-04-05
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Granted: 1966-07-12
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:29
CPC Classifications
E; E21; E21D; E21D19/00; E21D19/04; E21D9/00; E21D9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR PRODUCING EXCAVATIONS IN WATER-BEARING GROUND BY MEANS OF A CAISSON HAVING A DETERMINABLE DRIVING DIRECTION INCLUDING A TRANSVERSE WALL DEFINING A REARWARDLY DISPOSED PRESSURELESS CHAMBER, SAID PROCESS COMPRISING FORMING AND MAINTAINING A CUSHION OF THIXOTROPIC LIQUID AT THE FRONT END OF THE CAISSON BETWEEN THE EXCAVATION FACE AND THE TRANSVERSE WALL OF THE CAISSON, LOOSENING THE GROUND AT THE EXCAVATION FACE WHICH IS STABILIZED BY THE THIXOTROPIC LIQUID AND CONVEYING THE THUSLY LOOSENED GROUND INTO THE PRESSURELESS CHAMBER VIA A PASAGE IN THE CUSHION AND TRANSVERSE WALL.
Claim 2
Dependent Claim
90 words
A PROCESS FOR PRODUCING EXCAVATIONS IN WATER-BEARING GROUND BY MEANS OF A CAISSON HAVING A DETERMINABLE DRIVING DIRECTION INCLUDING A TRANSVERSE WALL DEFINING A REARWARDLY DISPOSED PRESSURELESS CHAMBER, SAID PROCESS COMPRISING FORMING AND MAINTAINING A CUSHION OF THIXOTROPIC LIQUID AT THE FRONT END OF THE CAISSON BETWEEN THE EXCAVATION FACE AND THE TRANSVERSE WALL OF THE CAISSON, LOOSENING THE GROUND AT THE EXCAVATION FACE WHICH IS STABILIZED BY THE THIXOTROPIC LIQUID AND CONVEYING THE THUSLY LOOSENED GROUND INTO THE PRESSURELESS CHAMBER VIA A PASAGE IN THE CUSHION AND TRANSVERSE WALL.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |