US2635745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating a mixture of granular or comminuted materials by air suspension
Assignee: Mead Corp
•
Filing: 1947-10-07
•
Granted: 1953-04-21
•
Expires: 1967-10-07
Abstract
No abstract record available.
Inventors
- 👤 William H Mead
- 👤 Lewis H Bishop
- 👤 Finn John Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:06
CPC Classifications
B; B24; B24C; B24C9/00; B24C9/006; B07; B07B; B07B4/00; B07B4/02; B07B4/04; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1272311A
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US39063A
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US1025730A
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US1506494A
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US1530277A
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US1721908A
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US1773840A
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US1761627A
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US1903046A
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US1994610A
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US2093446A
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US2129451A
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US2203959A
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US2247385A
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US2384891A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |