Patent US321731A successfully refreshed from Google Patents.
US4382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mill for grinding
Assignee: —
•
Filing: —
•
Granted: 1846-02-10
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Expires: 1863-02-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:37
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/11; B02C7/12
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) | 1849-02-09 | 1849-08-11 | 1850-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1853-02-09 | 1853-08-11 | 1854-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1857-02-09 | 1857-08-11 | 1858-02-10 | $7700.00 | Window Closed / Lapsed |