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US2646632A
Expired / Lapsed
US
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Ballast removing machine
Assignee: Individual
•
Filing: 1947-07-11
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Granted: 1953-07-28
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Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Kershaw Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:25
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US494368A
Cited
US1151561A
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US2174997A
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US2381425A
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US2416241A
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US2474471A
Cited
US2547596A
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US2449714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |