US2656115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway sleeper of reinforced concrete with rail fastening bolts
Assignee: Individual
•
Filing: 1950-02-25
•
Granted: 1953-10-20
•
Expires: 1970-02-25
Abstract
No abstract record available.
Inventors
- 👤 Sonneville Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:10
CPC Classifications
E; E01; E01B; E01B3/00; E01B3/28; E01B3/36; E01B9/00; E01B9/02; E01B9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US711277A
Cited
US793789A
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FR398461A
Cited
US1027370A
Cited
US1396566A
Cited
US1533411A
Cited
FR568471A
Cited
US1699197A
Cited
US1886265A
Cited
US2037965A
Cited
US2480388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |