Patent US2980A successfully refreshed from Google Patents.
US2980A
Expired / Lapsed
US
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Improvement in machines for breaking and scutching or cleaning flax and hemp
Assignee: —
•
Filing: —
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Granted: 1843-03-04
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Expires: 1860-03-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:51
CPC Classifications
D; D01; D01B; D01B1/00; D01B1/10; D01B1/14
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) | 1846-03-03 | 1846-09-02 | 1847-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1850-03-03 | 1850-09-02 | 1851-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1854-03-03 | 1854-09-02 | 1855-03-04 | $7700.00 | Window Closed / Lapsed |