US2993452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper car outlet construction
Assignee: Enterprise Railway Equipment Co
•
Filing: 1957-03-28
•
Granted: 1961-07-25
•
Expires: 1977-03-28
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1523363A
Cited
CA503824A
Cited
US1122918A
Cited
US2222280A
Cited
US2318763A
Cited
US2386702A
Cited
US2640438A
Cited
US2791973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |