US2855362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for solvent extraction
Assignee: Phillips Petroleum Co
•
Filing: 1955-02-21
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Granted: 1958-10-07
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 John D Ratje
- 👤 William G Morrison
- 👤 Jr Thomas Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:24
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/08; C10G21/10; C10G21/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
APPARATUS FOR EFFECTING LIQUID-LIQUID EXTRACTION OF A MIXED FEED STREAM, COMPRISING AN EXTRACTION COLUMN, A FEED LINE LEADING INTO AN INTERMEDIATE SECTION OF SAID COLUMN HAVING MEANS FOR CONTROLLING THE RATE OF FLOW THEREIN, A SOLVENT FEED LINE LEADING INTO AN UPPER SECTION OF SAID COLUMN HAVING MEANS FOR CONTROLLING THE RATE OF FLOW THEREIN, A RAFFINATE LINE LEADING FROM THE UPPERMOST SECTION OF SAID COLUMN, A SOLVENT-EXTRACT LINE LEADING FROM THE LOWERMOST SECTION OF SAID COLUMN, MEANS IN SAID SOLVENT-EXTRACT LINE FOR SEPARATING SOLVENT-EXTRACT INTO A SOL-
Claim 2
Dependent Claim
88 words
APPARATUS FOR EFFECTING LIQUID-LIQUID EXTRACTION OF A MIXED FEED STREAM, COMPRISING AN EXTRACTION COLUMN, A FEED LINE LEADING INTO AN INTERMEDIATE SECTION OF SAID COLUMN HAVING MEANS FOR CONTROLLING THE RATE OF FLOW THEREIN, A SOLVENT FEED LINE LEADING INTO AN UPPER SECTION OF SAID COLUMN HAVING MEANS FOR CONTROLLING THE RATE OF FLOW THEREIN, A RAFFINATE LINE LEADING FROM THE UPPERMOST SECTION OF SAID COLUMN, A SOLVENT-EXTRACT LINE LEADING FROM THE LOWERMOST SECTION OF SAID COLUMN, MEANS IN SAID SOLVENT-EXTRACT LINE FOR SEPARATING SOLVENT-EXTRACT INTO A SOL-
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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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |