US2960462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual film combinations for membrane permeation
Assignee: American Oil Co
•
Filing: 1957-09-30
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Granted: 1960-11-15
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Robert J Lee
- 👤 Joseph F Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/362; B01D69/00; B01D69/12; B01D69/1214; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/292; C; C07; C07C; C07C45/00; C07C45/78; C07C45/786
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
A PROCESS FOR THE SEPARATION OF CHEMICAL MIXTURES WHICH COMPRISES CONTACTING A FEED MIXTURE OF LIQUID ORGANIC CHEMICALS WITH ONE SIDE OF A DUAL LAYER LAMINATED PLASTIC PERMEATION MEMBRANE UNDER PERMEATION CONDITIONS AND REMOVING FROM THE OPPOSITE SIDE OF SAID LAMINATED MEMBRANE A PERMEATED PORTION OF THE SAID MIXTURE WHICH IS ENRICHED IN ONE COMPONENT OF THE MIXTURE, THE LAMINATED PERMEATION MEMBRANE BEING A THIN FILM OF PERMEABLE PLASTIC MEMBRANE MATERIAL MOUNTED UPON A THICKER FILM OF PERMEABLE PLASTIC MEMBRANE MATERIAL, THE SURFACE OF SAID THICKER FILM OF THE LAMINATED MEMBRANE BEING IN CONTACT WITH THE FEED MIXTURE TO BE SEPARATED, SAID THIN FILM BEING MORE SELECTED THAN SAID THICKER FILM FOR THE PERMEATION OF ONE COMPONENT OF THE FEED MIXTURE, AND SAID THICKER FILM HAVING A HIGHER PERMEATION RATE PER UNIT THICKNESS THAN SAID THIN FILM.
Claim 2
Dependent Claim
137 words
A PROCESS FOR THE SEPARATION OF CHEMICAL MIXTURES WHICH COMPRISES CONTACTING A FEED MIXTURE OF LIQUID ORGANIC CHEMICALS WITH ONE SIDE OF A DUAL LAYER LAMINATED PLASTIC PERMEATION MEMBRANE UNDER PERMEATION CONDITIONS AND REMOVING FROM THE OPPOSITE SIDE OF SAID LAMINATED MEMBRANE A PERMEATED PORTION OF THE SAID MIXTURE WHICH IS ENRICHED IN ONE COMPONENT OF THE MIXTURE, THE LAMINATED PERMEATION MEMBRANE BEING A THIN FILM OF PERMEABLE PLASTIC MEMBRANE MATERIAL MOUNTED UPON A THICKER FILM OF PERMEABLE PLASTIC MEMBRANE MATERIAL, THE SURFACE OF SAID THICKER FILM OF THE LAMINATED MEMBRANE BEING IN CONTACT WITH THE FEED MIXTURE TO BE SEPARATED, SAID THIN FILM BEING MORE SELECTED THAN SAID THICKER FILM FOR THE PERMEATION OF ONE COMPONENT OF THE FEED MIXTURE, AND SAID THICKER FILM HAVING A HIGHER PERMEATION RATE PER UNIT THICKNESS THAN SAID THIN FILM.
Claim 3
Dependent Claim
16 words
THE PROCESS OF CLAIM 1 WHEREIN THE MIXTURE OF ORGANIC CHEMICALS COMPRISES A MIXTURE OF HYDROCARBONS.
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |