US4950391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capillary dialyzer
Assignee: SECON DRANSFELD A CORP OF FED REP OF W GERMANY GmbH
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Filing: 1989-02-15
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Granted: 1990-08-21
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Expires: 2009-02-15
Abstract
Abstract The Capillary Dialyzer contains a housing (1) with a bundle of capillaries (2) contained within. There are between the capillaries threads (15) of a textured yarn assigned to the bundle of capillaries without connection to the individual capillaries. In the bundle of capillaries (2) is such a number of threads (15) which are distribued evenly over the cross section of the bundle so that the cross section of the dialyzate chamber is filled with the threads in a resilient and elastic way.
Inventors
- 👤 Ludwig Weickhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:31
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/02; B01D63/021; B01D2313/00; B01D2313/14; B01D2313/143
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A hollow fiber dialyzer comprising a housing, embedding compositions in said housing defining a dialyzing chamber between said compositions and blood inflow and outflow chambers outside of said compositions between said compositions and said housing, hollow fibers that are fastened at both ends and sealed to said embedding compositions so that the interiors of said fibers communicate with said inflow and outflow chambers and the exteriors of said fibers are exposed in said dialyzing chamber, and spacing threads that are fastened at both ends in said embedding compositions, are parallel to each other and said fibers, are uniformly distributed in said dialyzing chamber, and are independent of individual hollow fibers.
Claim 2
Dependent Claim
110 words
A hollow fiber dialyzer comprising a housing, embedding compositions in said housing defining a dialyzing chamber between said compositions and blood inflow and outflow chambers outside of said compositions between said compositions and said housing, hollow fibers that are fastened at both ends and sealed to said embedding compositions so that the interiors of said fibers communicate with said inflow and outflow chambers and the exteriors of said fibers are exposed in said dialyzing chamber, and spacing threads that are fastened at both ends in said embedding compositions, are parallel to each other and said fibers, are uniformly distributed in said dialyzing chamber, and are independent of individual hollow fibers.
Claim 3
Dependent Claim
25 words
The dialyzer of claim 1 wherein the threads have diameter that are the same size as or smaller than the diameters of the hollow fibers.
Claim 4
Dependent Claim
17 words
The dialyzer of claim 1 wherein there are between 10 and 25 said hollow fibers per thread.
Claim 5
Dependent Claim
11 words
The dialyzer of claim 1 wherein said threads are textured yarns.
Claim 6
Dependent Claim
20 words
The dialyzer of claim 4 wherein said textured yarns have porosity providing the same flow resistance as adjacent hollow fibers.
Claim 7
Dependent Claim
10 words
The dialyzer of claim 1 wherein said threads are multifilaments.
Claim 8
Dependent Claim
11 words
The dialyzer of claim 1 wherein said threads are crinkled monofilaments.
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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |