US53959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in locks
Assignee: —
•
Filing: —
•
Granted: 1866-04-17
•
Expires: 1883-04-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:02
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/08; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7153; Y10T70/7181; Y10T70/7198; Y10T70/7237; Y10T70/7243; Y10T70/7249; Y10T70/7322; Y10T70/7328; Y10T70/7339; Y10T70/735; Y10T70/7401; Y10T70/7424
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) | 1869-04-16 | 1869-10-16 | 1870-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-04-16 | 1873-10-16 | 1874-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-04-16 | 1877-10-16 | 1878-04-17 | $7700.00 | Window Closed / Lapsed |