Patent US2648293A successfully refreshed from Google Patents.
US2648293A
Expired / Lapsed
US
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Convertible railway car
Assignee: Enterprise Railway Equipment Co
•
Filing: 1948-12-03
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Granted: 1953-08-11
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Expires: 1968-12-03
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:53
CPC Classifications
B; B61; B61D; B61D3/00; B61D3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316713A
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FR327748A
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US739893A
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US766871A
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US1232822A
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US1255174A
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US1365216A
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US1565350A
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DE412278C
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US1706353A
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US1768728A
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US2566977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |