US2791973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating mechanism for sliding gate for a discharge outlet mounted on a load containing hopper of a railway car
Assignee: Enterprise Railway Equipment Co
•
Filing: 1952-01-04
•
Granted: 1957-05-14
•
Expires: 1972-01-04
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/20; B65; B65D; B65D90/00; B65D90/54; B65D90/58; B65D90/587
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |