Patent US2479141A successfully refreshed from Google Patents.
US2479141A
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Annular horizontal current gravity liquid classifier
Assignee: EIDP Inc
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Filing: 1945-06-29
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Granted: 1949-08-16
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Expires: 1965-06-29
Abstract
No abstract record available.
Inventors
- 👤 Frank E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:54
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/36; B03B5/42; B03B11/00; B03B2011/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1167638A
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US1186677A
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US1198404A
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GB400094A
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US2209618A
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US2150946A
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US2176107A
Cited
US2228014A
Cited
US2365734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |