Patent US2473488A successfully refreshed from Google Patents.
US2473488A
Expired / Lapsed
US
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Vortical current separator
Assignee: ZAREMBA CO
•
Filing: 1945-06-16
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Granted: 1949-06-14
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Expires: 1965-06-16
Abstract
No abstract record available.
Inventors
- 👤 Burton S Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:14
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0031; B01D9/0036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1869093A
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US1972730A
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US1939710A
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US1978802A
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US2008643A
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US2033985A
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US2156483A
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US2102525A
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US2330423A
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US2384747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |