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US3818679A
Expired / Lapsed
US
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Separation of gaseous mixtures under non-steady state conditions
Assignee: Gas Technology Institute
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Filing: 1973-02-12
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Granted: 1974-06-25
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Expires: 1993-02-12
Abstract
Abstract A gas mixture is separated into enriched components under nonsteady state conditions wherein a gas in a mixture is more favorably collected by a membrane through adsorption, permeation or both, before the composition of such collected gas reaches substantially constant levels.
Inventors
- 👤 D Klass
- 👤 C Landahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:54
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/144; B; B01; B01D; B01D53/00; B01D53/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
37 words
A method as in claim 1 wherein said gas permeable membrane system is an endless film so that a given point on said film is continuously recycled through respective sorption and desorption zones during said non-steady-state condition.
Claim 2
Dependent Claim
38 words
A method as in claim 1 wherein said gas permeable membrane system is a supported membrane sheet which reciprocates between adjoining sorption and desorption zones at predetermined velocities and pauses in the respective zones during said non-steady-state condition.
Claim 3
Dependent Claim
57 words
A method which includes the steps of claim 1 wherein said membrane is moved into a desorption zone, and wherein a point on said moved membrane is retained during movement in said desorption zone for a time sufficient for the component carried by said membrane to be substantially collected in said desorption zone as an enriched component.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |