Patent US3693A successfully refreshed from Google Patents.
US3693A
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Improvement in machines for rolling irregular figures to a pattern
Assignee: —
•
Filing: —
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Granted: 1844-08-07
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Expires: 1861-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:38
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/16; B21B31/20; B21B31/32
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) | 1847-08-07 | 1848-02-06 | 1848-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1851-08-07 | 1852-02-06 | 1852-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1855-08-07 | 1856-02-06 | 1856-08-07 | $7700.00 | Window Closed / Lapsed |