US2547577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countercurrent extraction apparatus
Assignee: Detrex Corp
•
Filing: 1946-07-22
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Granted: 1951-04-03
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Expires: 1966-07-22
Abstract
No abstract record available.
Inventors
- 👤 Hamacher Joseph Doyle
- 👤 Barns Roy Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:41
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C11B1/102; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN SOLVENT EXTRACTION APPARATUS, A SUBSTANTIALLY HORIZONTAL ELONGATE ROUND-BOTTOMED EXTRACTOR CHAMBER CONTAINING TREATING LIQUID; A CONFORMATIVE SCREW CONVEYER IN THE CHAMBER WITH A SOLID THREAD PORTION AND A THREAD PORTION IN CONTINUATION OF THE SOLID THREAD PORTION FORMED OF BRISTLES FOR ADVANCING DIVIDED SOLID MATTER IN THE LIQUID; A FILTER POCKET LATERALLY OFFSET FROM THE CHAMBER ADJACENT THE BRISTLE PROTION OF THE CONVEYER; AND A FILTER UNIT IN SAID POCKET COMPRISING A SCREEN AND A SHIFTABLE SUPPORTING FRAME THEREFOR, AND SPRING MEANS INFLUENTIAL UPON THE FRAME TO MAINTAIN THE SCREEN YIELDINGLY ENGAGED WITH THE BRISTLE PORTION OF THE CONVEYER.
Claim 2
Dependent Claim
99 words
IN SOLVENT EXTRACTION APPARATUS, A SUBSTANTIALLY HORIZONTAL ELONGATE ROUND-BOTTOMED EXTRACTOR CHAMBER CONTAINING TREATING LIQUID; A CONFORMATIVE SCREW CONVEYER IN THE CHAMBER WITH A SOLID THREAD PORTION AND A THREAD PORTION IN CONTINUATION OF THE SOLID THREAD PORTION FORMED OF BRISTLES FOR ADVANCING DIVIDED SOLID MATTER IN THE LIQUID; A FILTER POCKET LATERALLY OFFSET FROM THE CHAMBER ADJACENT THE BRISTLE PROTION OF THE CONVEYER; AND A FILTER UNIT IN SAID POCKET COMPRISING A SCREEN AND A SHIFTABLE SUPPORTING FRAME THEREFOR, AND SPRING MEANS INFLUENTIAL UPON THE FRAME TO MAINTAIN THE SCREEN YIELDINGLY ENGAGED WITH THE BRISTLE PORTION OF THE CONVEYER.
References Cited (Backward Citations)
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US979362A
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US1628787A
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US2181404A
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US2227605A
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US2355091A
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US2447845A
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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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |