Patent US4320A successfully refreshed from Google Patents.
US4320A
Expired / Lapsed
US
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Improvement in cultivators
Assignee: —
•
Filing: —
•
Granted: 1845-12-20
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Expires: 1862-12-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:15
CPC Classifications
F; F16; F16B; F16B2/00; F16B2/02; F16B2/14; E; E04; E04B; E04B5/00; E04B5/02; E04B5/10; F16B2200/00; F16B2200/40; Y; Y10; Y10T; Y10T403/00; Y10T403/76
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) | 1848-12-19 | 1849-06-20 | 1849-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1852-12-19 | 1853-06-20 | 1853-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1856-12-19 | 1857-06-20 | 1857-12-20 | $7700.00 | Window Closed / Lapsed |