US52226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in locks
Assignee: —
•
Filing: —
•
Granted: 1866-01-23
•
Expires: 1883-01-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:58
CPC Classifications
E; E05; E05B; E05B27/00; E05B27/02; E05B27/08; E05B27/083; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7588; Y10T70/7593; Y10T70/7667; Y10T70/7689; Y10T70/7701; Y10T70/778; Y10T70/7791
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) | 1869-01-22 | 1869-07-24 | 1870-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-01-22 | 1873-07-24 | 1874-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-01-22 | 1877-07-24 | 1878-01-23 | $7700.00 | Window Closed / Lapsed |