US21645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silas allington
Assignee: —
•
Filing: —
•
Granted: 1858-10-05
•
Expires: 1875-10-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:47
CPC Classifications
E; E06; E06B; E06B11/00; E06B11/02; E06B11/022; E06B11/023; E06B11/026; E05; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/531
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) | 1861-10-04 | 1862-04-05 | 1862-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1865-10-04 | 1866-04-05 | 1866-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1869-10-04 | 1870-04-05 | 1870-10-05 | $7700.00 | Window Closed / Lapsed |