US6533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved sculling-propeller
Assignee: —
•
Filing: —
•
Granted: 1849-06-19
•
Expires: 1866-06-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:58
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/30
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) | 1852-06-18 | 1852-12-18 | 1853-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1856-06-18 | 1856-12-18 | 1857-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1860-06-18 | 1860-12-18 | 1861-06-19 | $7700.00 | Window Closed / Lapsed |