US2665198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction recovery method and apparatus
Assignee: Blaw Knox Co
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Filing: 1949-08-10
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Granted: 1954-01-05
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Expires: 1969-08-10
Abstract
No abstract record available.
Inventors
- 👤 Guy N Harcourt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:51
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
IN THE CONTINUOUS METHOD OF SOLVENT EXTRACTION OF A DISSOLVABLE COMPONENT FROM SOLID PARTICLES IN WHICH THE PARTICLES ARE SUBJECTED TO PROLONGED CONTACT WITH A SOLVENT FOR SAID COMPONENT AND THEN SEPARATED FROM SUCH SOLVENT RETAINED BY PROVED METHOD OF REMOVING SOLVENT RETAINED BY THE PARTICLES WHICH COMPRISES MOVING THE PARTICLES, AFTER SUCH SEPARATION, UPWARDLY ALONG A CONFINED UPRIGHT PASSAGE, CONDUCTING STEAM THROUGH SAID MOVING MASS OF PARTICLES FROM BOTH ENDS OF SAID PASSAGE TO AN INTERMEDIATE PORTION OF THE PASSAGE AND THERE REMOVING IT WAS SOLVENT VAPORS FROM THE MASS OF PARTICLES AND SAID PASSAGE, AND THEN COOLING THE REMOVED STEAM AND VAPORS TO CONDENSE AND RECOVER THE SOLVENT THAT WAS VAPORIZED AND CARRIED OFF FROM SAID PARTICLES BY SAID STEAM.
References Cited (Backward Citations)
FR540379A
Cited
GB253333A
Cited
US2231154A
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US2264390A
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US2426296A
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US2387165A
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US2447845A
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US2547577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |