US54867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in sand-pumps
Assignee: —
•
Filing: —
•
Granted: 1866-05-22
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Expires: 1883-05-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:39
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10
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) | 1869-05-21 | 1869-11-20 | 1870-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-05-21 | 1873-11-20 | 1874-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-05-21 | 1877-11-20 | 1878-05-22 | $7700.00 | Window Closed / Lapsed |