US4642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in carding-mach i n es
Assignee: —
•
Filing: —
•
Granted: 1846-07-20
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Expires: 1863-07-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:40
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/02; D01G15/04
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) | 1849-07-19 | 1850-01-18 | 1850-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1853-07-19 | 1854-01-18 | 1854-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1857-07-19 | 1858-01-18 | 1858-07-20 | $7700.00 | Window Closed / Lapsed |