Patent US2461584A successfully refreshed from Google Patents.
US2461584A
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Air separation method for slurry separation
Assignee: FLSmidth and Co AS
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Filing: 1944-06-14
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Granted: 1949-02-15
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Expires: 1964-06-14
Abstract
No abstract record available.
Inventors
- 👤 Andersen Axel Brix
- 👤 Horn Knud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:40
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B4/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US459267A
Cited
US701827A
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US1212596A
Cited
US1517509A
Cited
US1595257A
Cited
US1660682A
Cited
FR751592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-15 | 1952-08-16 | 1953-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-15 | 1956-08-16 | 1957-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-15 | 1960-08-16 | 1961-02-15 | $7700.00 | Window Closed / Lapsed |