Patent DE2507244B1 successfully refreshed from Google Patents.
US2487447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dump car control
Assignee: ACF Industries Inc
•
Filing: 1943-08-04
•
Granted: 1949-11-08
•
Expires: 1963-08-04
Abstract
No abstract record available.
Inventors
- 👤 Robert C Kepner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:59
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1084607A
Cited
US1647876A
Cited
US1778828A
Cited
US1727689A
Cited
US1889066A
Cited
US1851695A
Cited
US2044019A
Cited
US2001471A
Cited
US2092801A
Cited
USRE22082E
Cited
US2225462A
Cited
US2399708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |