Patent US2564409A successfully refreshed from Google Patents.
US2564409A
Expired / Lapsed
US
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Extraction of oleiferous materials
Assignee: MW Kellogg Co
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Filing: 1947-04-23
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Granted: 1951-08-14
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Expires: 1967-04-23
Abstract
No abstract record available.
Inventors
- 👤 Louis C Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:00
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; C; C11; C11B; C11B1/00; C11B1/10; C11B1/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD FOR TREATING OLEIFEROUS SOLID MATERIALS WITH SOLVENT IN AN EXTRACTION ZONE TO OBTAIN OIL EXTRACT FROM SAID SOLID MATERIAL WHICH COMPRISES INTRODUCING INTO THE EXTRACTION ZONE A SOLVENT WHOSE BOILING POINT IS LOWER THAN THE TEMPERATURE OF EXTRACTION, MAINTAINING SAID EXTRACTION ZONE AT THE EXTRACTION TEMPERATURE AND UNDER A SUPERATMOSPHERIC PRESSURE EFFECTIVE TO MAINTAIN THE SOLVENT IN LIQUID CONDITION, MIXING SAID SOLID MATERIAL IN A FINELY DIVIDED CONDITION AT A POINT EXTERNAL OF SAID EXTRACTION ZONE WITH A SLURRY OIL COMPRISED OF COMPONENTS OF SAID OIL EXTRACT TO FORM A SLURRY, PUMPING SAID SLURRY INTO SAID EXTRACTION ZONE AGAINST THE PRESSURE THEREOF AND INTO CONTACT WITH SAID SOLVENT, WITHDRAWING AN EXTRACT SOLUTION CONTAINING SAID OIL EXTRACT FROM SAID EXTRACTION ZONE, SEPARATING FROM SAID EXTRACT SOLUTION AT LEAST A FRACTION OF SAID EXTRACT OIL, AND RECYCLING SAID EXTRACT OIL TO SAID SLURRY-FORMING STEP TO SERVE THEREIN AS SAID SLURRY OIL.
Claim 2
Independent Claim
151 words
A METHOD FOR TREATING OLEIFEROUS SOLID MATERIALS WITH SOLVENT IN AN EXTRACTION ZONE TO OBTAIN OIL EXTRACT FROM SAID SOLID MATERIAL WHICH COMPRISES INTRODUCING INTO THE EXTRACTION ZONE A SOLVENT WHOSE BOILING POINT IS LOWER THAN THE TEMPERATURE OF EXTRACTION, MAINTAINING SAID EXTRACTION ZONE AT THE EXTRACTION TEMPERATURE AND UNDER A SUPERATMOSPHERIC PRESSURE EFFECTIVE TO MAINTAIN THE SOLVENT IN LIQUID CONDITION, MIXING SAID SOLID MATERIAL IN A FINELY DIVIDED CONDITION AT A POINT EXTERNAL OF SAID EXTRACTION ZONE WITH A SLURRY OIL COMPRISED OF COMPONENTS OF SAID OIL EXTRACT TO FORM A SLURRY, PUMPING SAID SLURRY INTO SAID EXTRACTION ZONE AGAINST THE PRESSURE THEREOF AND INTO CONTACT WITH SAID SOLVENT, WITHDRAWING AN EXTRACT SOLUTION CONTAINING SAID OIL EXTRACT FROM SAID EXTRACTION ZONE, SEPARATING FROM SAID EXTRACT SOLUTION AT LEAST A FRACTION OF SAID EXTRACT OIL, AND RECYCLING SAID EXTRACT OIL TO SAID SLURRY-FORMING STEP TO SERVE THEREIN AS SAID SLURRY OIL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |