US31712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in plows
Assignee: —
•
Filing: —
•
Granted: 1861-03-19
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Expires: 1878-03-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
A; A01; A01B; A01B15/00; A01B15/02; A01B15/08
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) | 1864-03-18 | 1864-09-17 | 1865-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1868-03-18 | 1868-09-17 | 1869-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1872-03-18 | 1872-09-17 | 1873-03-19 | $7700.00 | Window Closed / Lapsed |