Patent US2638496A successfully refreshed from Google Patents.
Patent US2645090A successfully refreshed from Google Patents.
US2645090A
Expired / Lapsed
US
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Reinforcing of concrete piles
Assignee: RAYMOND CONCRETE PILE CO
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Filing: 1951-02-06
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Granted: 1953-07-14
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Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 William P Kinneman
- 👤 Warren N Riker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/58
Claims Analysis
Total Claims: 0
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |