Patent US1899874A successfully refreshed from Google Patents.
US1899874A
Expired / Lapsed
US
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System for continuously cleaning the ballast of railway tracks
Assignee: Individual
•
Filing: 1931-06-26
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Granted: 1933-02-28
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Expires: 1951-06-26
Abstract
No abstract record available.
Inventors
- 👤 Lemaire Maurice Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:31
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)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-02-28 | 1936-08-29 | 1937-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-28 | 1940-08-29 | 1941-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-28 | 1944-08-29 | 1945-02-28 | $7700.00 | Window Closed / Lapsed |