US2783191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionating continuous liquid-liquid extractor
Assignee: Individual
•
Filing: 1954-06-03
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Granted: 1957-02-26
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Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Vries Louis De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:47
CPC Classifications
C; C07; C07C; C07C255/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/0488; G; G01; G01N; G01N25/00; G01N25/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |