US2916794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-stressed concrete pile construction
Assignee: Ben C Gerwick Inc
•
Filing: 1954-03-23
•
Granted: 1959-12-15
•
Expires: 1974-03-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Ben C Gerwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:01
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/56; B28B21/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566583A
Cited
US1281404A
Cited
US1676325A
Cited
US1623539A
Cited
US2153741A
Cited
US2569612A
Cited
US2747249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |