Patent US2573731A successfully refreshed from Google Patents.
US18371A
Expired / Lapsed
US
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Improvement in sewing-machines
Assignee: —
•
Filing: —
•
Granted: 1857-10-06
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Expires: 1874-10-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:22
CPC Classifications
D; D05; D05B; D05B57/00; D05B57/02
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) | 1860-10-05 | 1861-04-06 | 1861-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1864-10-05 | 1865-04-06 | 1865-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1868-10-05 | 1869-04-06 | 1869-10-06 | $7700.00 | Window Closed / Lapsed |