Patent US3424441A successfully refreshed from Google Patents.
US61810A
Expired / Lapsed
US
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Improvement in permutation-locks
Assignee: —
•
Filing: —
•
Granted: 1867-02-05
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Expires: 1884-02-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:59
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/08; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5336; Y10T70/70; Y10T70/7153; Y10T70/735; Y10T70/7401; Y10T70/7424; Y10T70/7441; Y10T70/7915; Y10T70/7921
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) | 1870-02-04 | 1870-08-06 | 1871-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1874-02-04 | 1874-08-06 | 1875-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1878-02-04 | 1878-08-06 | 1879-02-05 | $7700.00 | Window Closed / Lapsed |