US2647372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine power unit for locomotives
Assignee: FELL DEVELOPMENTS Ltd
•
Filing: 1946-08-29
•
Granted: 1953-08-04
•
Expires: 1966-08-29
Abstract
No abstract record available.
Inventors
- 👤 Fell Louis Frederick Rudston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:20
CPC Classifications
B; B61; B61C; B61C9/00; B61C9/08; B61C9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1868130A
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US1978172A
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US1993983A
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US2134742A
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US2106843A
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US2187737A
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US2223715A
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US2403398A
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US2197179A
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US2428457A
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US2421496A
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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) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |