US31087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in field-rollers
Assignee: —
•
Filing: —
•
Granted: 1861-01-08
•
Expires: 1878-01-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:30
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/23; E01C19/26; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
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) | 1864-01-08 | 1864-07-09 | 1865-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1868-01-08 | 1868-07-09 | 1869-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1872-01-08 | 1872-07-09 | 1873-01-08 | $7700.00 | Window Closed / Lapsed |