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US2484255A
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Vortical gaseous-fluid type classifier for pulverized solid particles
Assignee: Blaw Knox Co
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Filing: 1946-02-15
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Granted: 1949-10-11
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Expires: 1966-02-15
Abstract
No abstract record available.
Inventors
- 👤 William A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:21
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06; B02C19/063
Claims Analysis
Total Claims: 0
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US2224169A
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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) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |