Patent US3221A successfully refreshed from Google Patents.
US3221A
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US
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Assignee: —
•
Filing: —
•
Granted: 1843-08-17
•
Expires: 1860-08-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:45
CPC Classifications
E; E05; E05B; E05B35/00; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7514
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) | 1846-08-16 | 1847-02-15 | 1847-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1850-08-16 | 1851-02-15 | 1851-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1854-08-16 | 1855-02-15 | 1855-08-17 | $7700.00 | Window Closed / Lapsed |