Patent US6851A successfully refreshed from Google Patents.
US6851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Southworth
Assignee: —
•
Filing: —
•
Granted: 1849-11-06
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Expires: 1866-11-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:31
CPC Classifications
B; B02; B02B; B02B3/00; B02B3/10
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) | 1852-11-05 | 1853-05-07 | 1853-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1856-11-05 | 1857-05-07 | 1857-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1860-11-05 | 1861-05-07 | 1861-11-06 | $7700.00 | Window Closed / Lapsed |