US3598537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous liquid extraction of solubles from solids
Assignee: GEA Group AG
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Filing: 1968-06-05
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Granted: 1971-08-10
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Expires: 1988-06-05
Abstract
Abstract LIQUIDS AND SOLID MATERIAL ARE IN COUNTERCURRENT FLOW THROUGH A PLURALITY OF MIXING ZONES OF WHICH ONE IS COMPOSED OF A PLURALITY OF POCKETS INTERCONNECTED WITH EACH OTHER. SOLID MATERIAL IS PERIODICALLY PASSED THROUGH EACH POCKET AND PARTIALLY RECYCLED, WHILE EXTRACTED MATERIAL IS WITHDRAWN. OVERALL EXTRACTION TIME IS SUBSTANTIALLY LESSENED.
Inventors
- 👤 Alfred Kraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:14
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0253; B01D11/0257
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |