Patent US2657713A successfully refreshed from Google Patents.
US2657713A
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US
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Wood culvert having laminated wall sections
Assignee: WHEELER LUMBER BRIDGE AND SUPP
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Filing: 1948-11-20
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Granted: 1953-11-03
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Expires: 1968-11-20
Abstract
No abstract record available.
Inventors
- 👤 Carl T Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:59
CPC Classifications
B; B27; B27M; B27M3/00; B27M3/0013; B27M3/0066
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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |