Patent US3426538A successfully refreshed from Google Patents.
US3426538A
Expired / Lapsed
US
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Method of making sand drains in situ
Assignee: Individual
•
Filing: 1965-03-19
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Granted: 1969-02-11
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Lee A Turzillo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:50
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/10; E02D3/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2048710A
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US2920455A
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CH350934A
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US3030656A
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US3100381A
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US3206936A
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US3200599A
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US3274782A
Cited
US3182460A
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US3191387A
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US3228200A
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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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |