Patent US160831A successfully refreshed from Google Patents.
US160831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in elevated railways
Assignee: —
•
Filing: —
•
Granted: 1875-03-16
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Expires: 1892-03-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:54
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/16
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) | 1878-03-15 | 1878-09-14 | 1879-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1882-03-15 | 1882-09-14 | 1883-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1886-03-15 | 1886-09-14 | 1887-03-16 | $7700.00 | Window Closed / Lapsed |