US71830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hugh williamson
Assignee: —
•
Filing: —
•
Granted: 1867-12-03
•
Expires: 1884-12-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:31
CPC Classifications
G; G09; G09B; G09B27/00; G09B27/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1870-12-02 | 1871-06-03 | 1871-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1874-12-02 | 1875-06-03 | 1875-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1878-12-02 | 1879-06-03 | 1879-12-03 | $7700.00 | Window Closed / Lapsed |