Patent US4233272A successfully refreshed from Google Patents.
US2953501A
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Apparatus for extraction by the double solvent method
Assignee: R O M AZIONARIA RAFFIN Soc
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Filing: 1958-01-22
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Granted: 1960-09-20
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Expires: 1978-01-22
Abstract
No abstract record available.
Inventors
- 👤 Mignone Tomaso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:21
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/02; C10G21/04; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
AN APPARATUS FOR THE EXTRACTION BY MEANS OF TWO SOLVENTS OF A HOMOGENEOUS MIXTURE OF TWO LIQUID COMPONENTS COMPRISING IN COMBINATION: A REFINING COLUMN AND AN EXTRACTION COLUMN, MEANS IN BOTH COLUMNS FOR PRODUCING INTIMATE CONTACT BETWEEN A LIQUID RISING AND A LIQUID DESCENDING THROUGH SAID COLUMNS, MEANS FOR FEEDING A REFINING SOLVENT INTO AN UPPER PART OF THE REFINING COLUMN, MEANS FOR FEEDING AN EXTRACTION SOLVENT INTO A LOWER PART OF THE EXTRACTION COLUMN, A MIXING RECEPTACLE IN COMMUNICATION WITH A BOTTOM ZONE OF THE REFINING COLUMN AND WITH A TOP ZONE OF THE EXTRACTION COLUMN, MEANS FOR FEEDING THE AFOREMENTIONED HOMOGENEOUS MIXTURE INTO THE MIXING RECEPTACLE, A SEPARATOR RECEPTACLE CONNECTED TO BE FED FROM SAID MIXING RECEPTACLE AND HAVING A LOWER ZONE IN COMMUNICATION WITH AN UPPER ZONE FOR THE EXTRACTION COLUMN AND AN UPPER ZONE IN COMMUNICATION WITH A LOWER ZONE OF THE REFINING COLUMN, AND MEANS BRANCHING FROM THE TOP OF THE REFINING COLUMN AND FROM THE BOTTOM OF THE EXTRACTION COLUMN FOR TAKING FROM THE SAID COLUMNS THE REFINED AND EXTRACTED PRODUCTS RESPECTIVELY.
Claim 2
Independent Claim
178 words
AN APPARATUS FOR THE EXTRACTION BY MEANS OF TWO SOLVENTS OF A HOMOGENEOUS MIXTURE OF TWO LIQUID COMPONENTS COMPRISING IN COMBINATION: A REFINING COLUMN AND AN EXTRACTION COLUMN, MEANS IN BOTH COLUMNS FOR PRODUCING INTIMATE CONTACT BETWEEN A LIQUID RISING AND A LIQUID DESCENDING THROUGH SAID COLUMNS, MEANS FOR FEEDING A REFINING SOLVENT INTO AN UPPER PART OF THE REFINING COLUMN, MEANS FOR FEEDING AN EXTRACTION SOLVENT INTO A LOWER PART OF THE EXTRACTION COLUMN, A MIXING RECEPTACLE IN COMMUNICATION WITH A BOTTOM ZONE OF THE REFINING COLUMN AND WITH A TOP ZONE OF THE EXTRACTION COLUMN, MEANS FOR FEEDING THE AFOREMENTIONED HOMOGENEOUS MIXTURE INTO THE MIXING RECEPTACLE, A SEPARATOR RECEPTACLE CONNECTED TO BE FED FROM SAID MIXING RECEPTACLE AND HAVING A LOWER ZONE IN COMMUNICATION WITH AN UPPER ZONE FOR THE EXTRACTION COLUMN AND AN UPPER ZONE IN COMMUNICATION WITH A LOWER ZONE OF THE REFINING COLUMN, AND MEANS BRANCHING FROM THE TOP OF THE REFINING COLUMN AND FROM THE BOTTOM OF THE EXTRACTION COLUMN FOR TAKING FROM THE SAID COLUMNS THE REFINED AND EXTRACTED PRODUCTS RESPECTIVELY.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |