Patent US8867A successfully refreshed from Google Patents.
US8867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
John valentine
Assignee: —
•
Filing: —
•
Granted: 1852-04-06
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Expires: 1869-04-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:39
CPC Classifications
E; E01; E01B; E01B25/00; E01B25/28
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) | 1855-04-06 | 1855-10-06 | 1856-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1859-04-06 | 1859-10-06 | 1860-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1863-04-06 | 1863-10-06 | 1864-04-06 | $7700.00 | Window Closed / Lapsed |