Patent US5810741A successfully refreshed from Google Patents.
US218595A
Expired / Lapsed
US
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Improvement in pneumatic grain-elevators
Assignee: —
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Filing: —
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Granted: 1879-08-12
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Expires: 1896-08-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:25
CPC Classifications
F; F23; F23K; F23K3/00
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) | 1882-08-11 | 1883-02-10 | 1883-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-08-11 | 1887-02-10 | 1887-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-08-11 | 1891-02-10 | 1891-08-12 | $7700.00 | Window Closed / Lapsed |