US2479292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating mechanism for dump cars
Assignee: Enterprise Railway Equipment Co
•
Filing: 1946-03-14
•
Granted: 1949-08-16
•
Expires: 1966-03-14
Abstract
No abstract record available.
Inventors
- 👤 William F Batho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/26; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474; Y10T74/20486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US801459A
Cited
US1124188A
Cited
US1300471A
Cited
US1445444A
Cited
US1517005A
Cited
US1711211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |