US1956967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revetment and method and apparatus for forming the same
Assignee: RAYMOND CONCRETE PILE CO
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Filing: 1929-04-16
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Granted: 1934-05-01
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Expires: 1949-04-16
Abstract
No abstract record available.
Inventors
- 👤 Maxwell M Upson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:50
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-04-30 | 1937-10-30 | 1938-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-30 | 1941-10-30 | 1942-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-30 | 1945-10-30 | 1946-05-01 | $7700.00 | Window Closed / Lapsed |