Patent US2477160A successfully refreshed from Google Patents.
US2477160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air separator for granular material
Assignee: University of Tennessee Research Foundation
•
Filing: 1944-07-13
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Granted: 1949-07-26
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Expires: 1964-07-13
Abstract
No abstract record available.
Inventors
- 👤 Harold A Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:15
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US15630A
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US36980A
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US1484208A
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US840724A
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US1873395A
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US1930684A
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US2221385A
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US2298497A
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US2381954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |