Patent US41827A successfully refreshed from Google Patents.
US41827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in locks
Assignee: —
•
Filing: —
•
Granted: 1864-03-08
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Expires: 1881-03-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:50
CPC Classifications
E; E05; E05B; E05B21/00; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7537; Y10T70/7542; Y10T70/7548
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) | 1867-03-08 | 1867-09-07 | 1868-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1871-03-08 | 1871-09-07 | 1872-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1875-03-08 | 1875-09-07 | 1876-03-08 | $7700.00 | Window Closed / Lapsed |