US2630771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper car door latching mechanism
Assignee: Enterprise Railway Equipment Co
•
Filing: 1947-12-05
•
Granted: 1953-03-10
•
Expires: 1967-12-05
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:39
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1006; Y10T292/1007; Y10T292/1009
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1434177A
Cited
US1633762A
Cited
US1431507A
Cited
US1515834A
Cited
US1788488A
Cited
US1798578A
Cited
US1913154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |