US3228877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeability separatory apparatus and process utilizing hollow fibers
Assignee: Dow Chemical Co
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Filing: 1961-06-16
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Granted: 1966-01-11
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Henry I Mahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:29
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/025; A; A23; A23F; A23F5/00; A23F5/24; A23F5/28; B01D63/00; B01D63/02; B01D63/021; B01D63/022; B01D63/0221; B01D63/04; B01D63/043; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S159/00; Y10S159/27; Y10S435/00; Y10S435/803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS OF OXMOTIC SEPARATION COMPRISING PASSING A FLUID HAVING A PLURALITY OF COMPONENTS INTO CONTACT WITH THE EXTERIOR WALLS OF A MULTIPLICITY OF BUNDLES OF OPENENDED CONTINUOUSLY HOLLOW FIBERS WHICH ARE PERMEABLE TO AT LEAST ONE OF THE FLUID COMPONENTS WHILE SUPPORTING SAID FIBERS AT THE TERMINAL PORTIONS THEREOFONLY, AND SIMULTANEOUSLY PASSING THROUGH THE INTERIORS OF SAID HOLLOW FIBERS A SECOND FLUID CONTAINING THE SAME SOLVENT AS SAID FIRST FLUID, AND INCREASING THE OSMOTIC ACTIVITY GRADIENT BETWEEN THE EXTERIOR AND INTERIOR OF SAID FIBERS BY DISSOLVING A SOLUBE COMPOUND IN SAID SECOND FLUID.
Claim 2
Dependent Claim
94 words
A PROCESS OF OXMOTIC SEPARATION COMPRISING PASSING A FLUID HAVING A PLURALITY OF COMPONENTS INTO CONTACT WITH THE EXTERIOR WALLS OF A MULTIPLICITY OF BUNDLES OF OPENENDED CONTINUOUSLY HOLLOW FIBERS WHICH ARE PERMEABLE TO AT LEAST ONE OF THE FLUID COMPONENTS WHILE SUPPORTING SAID FIBERS AT THE TERMINAL PORTIONS THEREOFONLY, AND SIMULTANEOUSLY PASSING THROUGH THE INTERIORS OF SAID HOLLOW FIBERS A SECOND FLUID CONTAINING THE SAME SOLVENT AS SAID FIRST FLUID, AND INCREASING THE OSMOTIC ACTIVITY GRADIENT BETWEEN THE EXTERIOR AND INTERIOR OF SAID FIBERS BY DISSOLVING A SOLUBE COMPOUND IN SAID SECOND FLUID.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |