US2984623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeation process using irradiated polyethylene membrane
Assignee: Standard Oil Co
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Filing: 1956-10-22
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Granted: 1961-05-16
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert J Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:59
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/009; B01D61/00; B01D61/36; B01D61/362; B01D71/00; B01D71/06; B01D71/26; B01D71/261; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/292; C; C07; C07C; C07C45/00; C07C45/78; C07C45/786; B01D2311/00; B01D2311/10; B01D2311/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A PERMEATION PROCESS WHEREIN A LIQUID MIXTURE OF AT LEAST TWO COMPOUNDS, WHICH COMPOUNDS PERMEATE AT DIFFERENT RATES THROUGH A PLASTIC MEMBRANE, IS SEPARATED BY CONTACTING THE LIQUID MIXTURE IN THE FEED ZONE OF A PERMEATION APPARATUS WITH ONE SIDE OF A PLSTIC MEMBRANE IN WHICH ONE OF THE COMPONENTS OF THE MIXTURE IS MORE SOLUBLE THAN ANOTHER, PERMEATING A PORTION OF THE MIXTURE THROUGH THE MEMBRANE AND REMOVING FROM THE OPPOSITE SIDE OF THE MEMBRANE INTO THE PERMEATE ZONE VAPORS OF THE PERMEATED MIXTURE ENRICHED IN THE COMPONENT MORE SOLUBLE IN THE MEMBRANE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS SAID MEMBRANE A POLYETHYLENE MEMBRANE WHICH HAS BEEN IRRADIATED AT A DOSAGE LEVEL BETWEEN ABOUT 1 AND 200 MEGAROENTGENS/SQ. CM. OF MEMBRANE SURFACE AND CARRYING OUT THE PERMEATION PROCESS AT A TEMPERATURE ABOVE ABOUT 75*C.
Claim 2
Dependent Claim
136 words
IN A PERMEATION PROCESS WHEREIN A LIQUID MIXTURE OF AT LEAST TWO COMPOUNDS, WHICH COMPOUNDS PERMEATE AT DIFFERENT RATES THROUGH A PLASTIC MEMBRANE, IS SEPARATED BY CONTACTING THE LIQUID MIXTURE IN THE FEED ZONE OF A PERMEATION APPARATUS WITH ONE SIDE OF A PLSTIC MEMBRANE IN WHICH ONE OF THE COMPONENTS OF THE MIXTURE IS MORE SOLUBLE THAN ANOTHER, PERMEATING A PORTION OF THE MIXTURE THROUGH THE MEMBRANE AND REMOVING FROM THE OPPOSITE SIDE OF THE MEMBRANE INTO THE PERMEATE ZONE VAPORS OF THE PERMEATED MIXTURE ENRICHED IN THE COMPONENT MORE SOLUBLE IN THE MEMBRANE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS SAID MEMBRANE A POLYETHYLENE MEMBRANE WHICH HAS BEEN IRRADIATED AT A DOSAGE LEVEL BETWEEN ABOUT 1 AND 200 MEGAROENTGENS/SQ. CM. OF MEMBRANE SURFACE AND CARRYING OUT THE PERMEATION PROCESS AT A TEMPERATURE ABOVE ABOUT 75*C.
References Cited (Backward Citations)
US2386826A
Cited
US2475990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |