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US2996887A
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Core structures for driving and retapping shell type piles
Assignee: Raymond International Inc
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Filing: 1958-11-07
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Granted: 1961-08-22
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Expires: 1978-11-07
Abstract
No abstract record available.
Inventors
- 👤 Willard H Rice
- 👤 Edward A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:58
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/28; E02D7/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL74077C
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US1645398A
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US2069603A
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US1893011A
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FR903317A
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US2645090A
Cited
US2712436A
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US2680358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |