US2581051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating liquid reflux systems in fractional distillation
Assignee: Standard Oil Development Co
•
Filing: 1949-06-01
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Granted: 1952-01-01
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Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Charles W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; Y; Y10; Y10S; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD FOR FRACTIONATING VAPORIZED LIQUID MATERIALS, IN WHICH LIQUIDS, INCLUDING A CONDENSATE OF SAID MATERIALS, ARE PASSED DOWNWARDLY THROUGH A FRACTIONATION ZONE AND VAPORS UPWARDLY THERETHROUGH IN COUNTERCURRENT RELATION, A PRODUCT FRACTION OF SAID MATERIALS BEING WITHDRAWN FROM A SELECTED LEVEL IN SAID ZONE AS A LIQUID CONDENSATE, WHICH COMPRISES WITHDRAWING A PORTION OF SAID LIQUIDS AS A STREAM OF LIQUIDS FROM A SELECTED LEVEL IN THE ZONE, SUBSTANTIALLY BELOW THAT AT WHICH A PRODUCT FRACTION IS WITHDRAWN, INITIALLY COOLING SAID STREAM BY HEAT EXCHANGE, WITHDRAWING A PORTION OF THE INITIALLY COOLED STREAM, RETURNING SAID PORTION AS REFLUX TO A LEVEL IN SAID ZONE SUBSTANTIALLY ABOVE THE LEVEL FROM WHICH THE INITIAL STREAM IS WITHDRAWN, BUT BELOW THAT AT WHICH SAID PRODUCT FRACTION IS WITH-
Claim 2
Independent Claim
126 words
A METHOD FOR FRACTIONATING VAPORIZED LIQUID MATERIALS, IN WHICH LIQUIDS, INCLUDING A CONDENSATE OF SAID MATERIALS, ARE PASSED DOWNWARDLY THROUGH A FRACTIONATION ZONE AND VAPORS UPWARDLY THERETHROUGH IN COUNTERCURRENT RELATION, A PRODUCT FRACTION OF SAID MATERIALS BEING WITHDRAWN FROM A SELECTED LEVEL IN SAID ZONE AS A LIQUID CONDENSATE, WHICH COMPRISES WITHDRAWING A PORTION OF SAID LIQUIDS AS A STREAM OF LIQUIDS FROM A SELECTED LEVEL IN THE ZONE, SUBSTANTIALLY BELOW THAT AT WHICH A PRODUCT FRACTION IS WITHDRAWN, INITIALLY COOLING SAID STREAM BY HEAT EXCHANGE, WITHDRAWING A PORTION OF THE INITIALLY COOLED STREAM, RETURNING SAID PORTION AS REFLUX TO A LEVEL IN SAID ZONE SUBSTANTIALLY ABOVE THE LEVEL FROM WHICH THE INITIAL STREAM IS WITHDRAWN, BUT BELOW THAT AT WHICH SAID PRODUCT FRACTION IS WITH-
References Cited (Backward Citations)
US1744421A
Cited
US1991792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |