Patent US2911734A successfully refreshed from Google Patents.
US2911734A
Expired / Lapsed
US
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Railway ballast digging apparatus
Assignee: FAIRMONT RAILWAY MOTORS Inc
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Filing: 1953-09-28
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Granted: 1959-11-10
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Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Sublett Ira
- 👤 Charles D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:00
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1369745A
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US2381017A
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US2594991A
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US2601752A
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US2624129A
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US2640285A
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US2697887A
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US2777220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |