US2808996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boltless rail joint
Assignee: Poor and Co
•
Filing: 1954-09-15
•
Granted: 1957-10-08
•
Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 James G Delfox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:39
CPC Classifications
E; E01; E01B; E01B11/00; E01B11/02; E01B11/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476241A
Cited
US552082A
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US1563966A
Cited
US1779802A
Cited
US2084286A
Cited
US2204304A
Cited
US2570742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |