US39578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in artificial limbs
Assignee: —
•
Filing: 1863-08-18
•
Granted: 1863-08-18
•
Expires: 1883-08-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:58
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/54; A61F2/58; A61F2/583; A61F2/586; A61F2/588
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) | 1866-08-17 | 1867-02-16 | 1867-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1870-08-17 | 1871-02-16 | 1871-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1874-08-17 | 1875-02-16 | 1875-08-18 | $7700.00 | Window Closed / Lapsed |