US21689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Island
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
2026-10-27 23:07
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/16; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7153; Y10T70/7181; Y10T70/7198; Y10T70/7215; Y10T70/7226
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 |