US2567474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countercurrent solvent extractor
Assignee: Read Standard Corp
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Filing: 1947-07-02
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Granted: 1951-09-11
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Expires: 1967-07-02
Abstract
No abstract record available.
Inventors
- 👤 George R Fitts
- 👤 Frederick G Low
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:15
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0234
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A COUNTERCURRENT SOLVENT EXTRACTION APPARATUS, A SERIES OF TROUGHS ARRANGED SIDE BY SIDE AND FORMING THE BOTTOM OF AN EXTRACTION CHAMBER, EACH PAIR OF ADJACENT TROUGHS HAVING THEIR ADJACENT WALLS MEETING IN A COMMON TOP EDGE PORTION, SAID ADJACENT WALLS HAVING PASSAGEWAYS FORMED IN SAID COMMON TOP EDGE PORTION AND ABOVE THE BOTTOM OF SAID TROUGHS PROVIDING FOR THE FLOW OF SOLVENT THERETHROUGH FROM ONE TROUGH TO THE NEXT TO MAINTAIN THE SOLVENT AT THE LEVEL OF SAID PASSAGEWAYS AND CONVEYING MEANS ROTATING IN SAID TROUGHS ABOVE AND BELOW THE LEVEL OF SAID PASSAGEWAYS FOR MOVING THE MATERIAL THROUGH SAID TROUGHS COUNTER TO THE DIRECTION OF FLOW OF THE SOLVENT AND ABOVE SAID PASSAGEWAYS FOR DEPOSITING IT OVER SAID COMMON TOP EDGE PORTIONS INTO THE NEXT SUCCEEDING TROUGH.
Claim 2
Dependent Claim
129 words
IN A COUNTERCURRENT SOLVENT EXTRACTION APPARATUS, A SERIES OF TROUGHS ARRANGED SIDE BY SIDE AND FORMING THE BOTTOM OF AN EXTRACTION CHAMBER, EACH PAIR OF ADJACENT TROUGHS HAVING THEIR ADJACENT WALLS MEETING IN A COMMON TOP EDGE PORTION, SAID ADJACENT WALLS HAVING PASSAGEWAYS FORMED IN SAID COMMON TOP EDGE PORTION AND ABOVE THE BOTTOM OF SAID TROUGHS PROVIDING FOR THE FLOW OF SOLVENT THERETHROUGH FROM ONE TROUGH TO THE NEXT TO MAINTAIN THE SOLVENT AT THE LEVEL OF SAID PASSAGEWAYS AND CONVEYING MEANS ROTATING IN SAID TROUGHS ABOVE AND BELOW THE LEVEL OF SAID PASSAGEWAYS FOR MOVING THE MATERIAL THROUGH SAID TROUGHS COUNTER TO THE DIRECTION OF FLOW OF THE SOLVENT AND ABOVE SAID PASSAGEWAYS FOR DEPOSITING IT OVER SAID COMMON TOP EDGE PORTIONS INTO THE NEXT SUCCEEDING TROUGH.
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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |