US2748959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for accelerating the evacuation of hopper type railway cars
Assignee: Individual
•
Filing: 1951-10-15
•
Granted: 1956-06-05
•
Expires: 1971-10-15
Abstract
No abstract record available.
Inventors
- 👤 Leland G Plant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/32; B61D7/16; B61D7/24; B61D7/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US833761A
Cited
US1908104A
Cited
US2032934A
Cited
US2060130A
Cited
US2185850A
Cited
US2494584A
Cited
US2471849A
Cited
US2621813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |