Patent US5731A successfully refreshed from Google Patents.
US5731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elisha k
Assignee: —
•
Filing: —
•
Granted: 1848-08-22
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Expires: 1865-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:17
CPC Classifications
C; C03; C03B; C03B11/00; C03B11/06; B; B21; B21D; B21D37/00; B21D37/20; B21D37/205
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) | 1851-08-22 | 1852-02-21 | 1852-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1855-08-22 | 1856-02-21 | 1856-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1859-08-22 | 1860-02-21 | 1860-08-22 | $7700.00 | Window Closed / Lapsed |