US2950144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective pneumatic and gravity discharge car hopper construction
Assignee: Enterprise Railway Equipment Co
•
Filing: 1958-08-18
•
Granted: 1960-08-23
•
Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
B; B61; B61D; B61D5/00; B61D5/002; B61D5/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189401904A
Cited
US1272515A
Cited
US1401052A
Cited
GB239505A
Cited
US2069739A
Cited
US2284781A
Cited
US2502741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |