US2850362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor
Assignee: F Hoffmann La Roche AG
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Filing: 1955-03-29
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Granted: 1958-09-02
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Expires: 1975-03-29
Abstract
No abstract record available.
Inventors
- 👤 Scheibel Edward George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D11/0434
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A SOLVENT EXTRACTION APPARATUS COMPRISING A VERTICALLY ELONGATED COLUMN DIVIDED INTO A PLURALITY OF SEPARATE SECTIONS BY FLAT, ANNULAR, HORIZONTAL BAFFLES POSITIONED AT SPACED INTERVALS ALONG THE INTERIOR WALL OF THE COLUMN, SAID BAFFLES SEPARATING THE COLUMN INTO SECTIONS COMMUNICATING THROUGH THE CENTRAL OPENINGS IN SAID BAFFLES, SAID SECTIONS COMPRISING ALTERNATE MIXING AND CLAMING SECTIONS, A CENTRALLY LOCATED, ROTATABLE SHAFT EXTENDING VERTICALLY THROUGH THE COLUMN, VERTICAL BLADE AGITATORS MOUNTED ON SAID SHAFT AND EXTENDING RADIALLY INTO EACH MIXING SECTION, A FLAT, ANNULAR FLOW CONTROL PLATE HORIZONTALLY POSITIONED IN SPACED RELATIONSHIP ABOVE AND BELOW EACH AGITATOR NOT FARTHER FROM THE AGITATOR THAN THE MIDPOINT BETWEEN THE HORIZONTAL CENTER LINES OF THE AGITATOR AND ADJACENT BAFFLE, EACH OF SAID ANNULAR FLOW CONTROL PLATES BEING CENTRALLY LOCATED WITHIN THE COLUMN, HAVING AN OUTSIDE DIAMETER SUBSTANTIALLY LESS THAN THE INSIDE DIAMETER OF THE COLUMN AND DIRECTING THE SMOOTH FLOW OF LIQUID THROUGH ITS CENTRAL OPENING AND AROUND ITS SIDES SUBSTANTIALLY TO THE COLUMN WALL, THE DIAMETER OF THE CENTRAL OPENINGS OF TE ANNUAL FLOW CONTROL PLATES BEING SMALLER THAN THE OUTSIDE DIAMETER OF THE AGITATOR AND THE OUTSIDE DIAMETER OF THE FLOW CONTROL PLATES BEING GREATER THAN THE DIAMETER OF THE CENTRAL OPENINGS IN SAID FLAT, ANNULAR BAFFLES, PACKING MEANS IN EACH CLAMING SECTION, STATIONARY
Claim 2
Dependent Claim
211 words
A SOLVENT EXTRACTION APPARATUS COMPRISING A VERTICALLY ELONGATED COLUMN DIVIDED INTO A PLURALITY OF SEPARATE SECTIONS BY FLAT, ANNULAR, HORIZONTAL BAFFLES POSITIONED AT SPACED INTERVALS ALONG THE INTERIOR WALL OF THE COLUMN, SAID BAFFLES SEPARATING THE COLUMN INTO SECTIONS COMMUNICATING THROUGH THE CENTRAL OPENINGS IN SAID BAFFLES, SAID SECTIONS COMPRISING ALTERNATE MIXING AND CLAMING SECTIONS, A CENTRALLY LOCATED, ROTATABLE SHAFT EXTENDING VERTICALLY THROUGH THE COLUMN, VERTICAL BLADE AGITATORS MOUNTED ON SAID SHAFT AND EXTENDING RADIALLY INTO EACH MIXING SECTION, A FLAT, ANNULAR FLOW CONTROL PLATE HORIZONTALLY POSITIONED IN SPACED RELATIONSHIP ABOVE AND BELOW EACH AGITATOR NOT FARTHER FROM THE AGITATOR THAN THE MIDPOINT BETWEEN THE HORIZONTAL CENTER LINES OF THE AGITATOR AND ADJACENT BAFFLE, EACH OF SAID ANNULAR FLOW CONTROL PLATES BEING CENTRALLY LOCATED WITHIN THE COLUMN, HAVING AN OUTSIDE DIAMETER SUBSTANTIALLY LESS THAN THE INSIDE DIAMETER OF THE COLUMN AND DIRECTING THE SMOOTH FLOW OF LIQUID THROUGH ITS CENTRAL OPENING AND AROUND ITS SIDES SUBSTANTIALLY TO THE COLUMN WALL, THE DIAMETER OF THE CENTRAL OPENINGS OF TE ANNUAL FLOW CONTROL PLATES BEING SMALLER THAN THE OUTSIDE DIAMETER OF THE AGITATOR AND THE OUTSIDE DIAMETER OF THE FLOW CONTROL PLATES BEING GREATER THAN THE DIAMETER OF THE CENTRAL OPENINGS IN SAID FLAT, ANNULAR BAFFLES, PACKING MEANS IN EACH CLAMING SECTION, STATIONARY
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |