Patent US2640438A successfully refreshed from Google Patents.
US2640438A
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Outlet assembly for hopper type railway cars
Assignee: Enterprise Railway Equipment Co
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Filing: 1949-08-24
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Granted: 1953-06-02
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Expires: 1969-08-24
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:21
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US494351A
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US1623303A
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US949395A
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US977095A
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US1795016A
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US2145174A
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US2142236A
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US2222280A
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US2340519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |