Patent US2778128A successfully refreshed from Google Patents.
US2778128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for clearing away the ballast from railway tracks
Assignee: Individual
•
Filing: 1952-12-15
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Granted: 1957-01-22
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Expires: 1972-12-15
Abstract
No abstract record available.
Inventors
- 👤 Drouard Jacques
- 👤 Boulard Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:32
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US532852A
Cited
US918016A
Cited
US1778690A
Cited
US1804418A
Cited
US2004051A
Cited
US1918349A
Cited
GB417745A
Cited
US2618083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |