US2737901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for clearing away the ballast from under the railway track sleepers
Assignee: Individual
•
Filing: 1951-11-14
•
Granted: 1956-03-13
•
Expires: 1971-11-14
Abstract
No abstract record available.
Inventors
- 👤 Drouard Jacques
- 👤 Boulard Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/06; E01B27/10; E01B27/105; E01B2203/00; E01B2203/01; E01B2203/015; E01B2203/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2004051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |