US11581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in clamps for sewing-machines
Assignee: —
•
Filing: —
•
Granted: 1854-08-22
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Expires: 1871-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:06
CPC Classifications
D; D05; D05B; D05B39/00
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) | 1857-08-21 | 1858-02-20 | 1858-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1861-08-21 | 1862-02-20 | 1862-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1865-08-21 | 1866-02-20 | 1866-08-22 | $7700.00 | Window Closed / Lapsed |