Patent US2945815A successfully refreshed from Google Patents.
US578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
William h
Assignee: —
•
Filing: —
•
Granted: 1838-01-20
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Expires: 1855-01-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:18
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/10
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) | 1841-01-19 | 1841-07-21 | 1842-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1845-01-19 | 1845-07-21 | 1846-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1849-01-19 | 1849-07-21 | 1850-01-20 | $7700.00 | Window Closed / Lapsed |