US3358458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for installing nondisplacement sand drains
Assignee: Raymond International Inc
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Filing: 1964-01-08
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Granted: 1967-12-19
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Expires: 1984-01-08
Abstract
No abstract record available.
Inventors
- 👤 Lindsey J Phares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:06
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/10; E02D3/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
METHOD FOR INSTALLING SAND DRAINS IN WATER-BEARING EARTH WHICH COMPRISES: LOWERING INTO SUCH EARTH AN OUTER SHELL SURROUNDING AN INNER SHELL WHILE ALLOWING A PLUG OF THE WATER-BEARING EARTH FREELY TO ENTER UP INTO THE INNER SHELL THROUGH THE LOWER ENDS OF THE SHELLS; THEN WITHDRAWING THE INNER SHELL CONTAINING SAID PLUG REMOVING SAID PLUG FROM THE WITHDRAWN INNER SHELL AND REINSERTING THE INNER SHELL INTO THE OUTER SHELL; THEREAFTER INTRODUCING SAND INTO SPACE WITHIN THE OUTER SHELL; AND FINALLY WITHDRAW-
Claim 2
Dependent Claim
81 words
METHOD FOR INSTALLING SAND DRAINS IN WATER-BEARING EARTH WHICH COMPRISES: LOWERING INTO SUCH EARTH AN OUTER SHELL SURROUNDING AN INNER SHELL WHILE ALLOWING A PLUG OF THE WATER-BEARING EARTH FREELY TO ENTER UP INTO THE INNER SHELL THROUGH THE LOWER ENDS OF THE SHELLS; THEN WITHDRAWING THE INNER SHELL CONTAINING SAID PLUG REMOVING SAID PLUG FROM THE WITHDRAWN INNER SHELL AND REINSERTING THE INNER SHELL INTO THE OUTER SHELL; THEREAFTER INTRODUCING SAND INTO SPACE WITHIN THE OUTER SHELL; AND FINALLY WITHDRAW-
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |