US2684577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible pile-driving core
Assignee: RAYMOND CONCRETE PILE CO
•
Filing: 1952-06-25
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Granted: 1954-07-27
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Expires: 1972-06-25
Abstract
No abstract record available.
Inventors
- 👤 Edward A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:52
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/28; E02D7/30; E02D5/00; E02D5/66; E02D5/665
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) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |