US4995967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separator for cell-containing liquids
Assignee: Akzo NV
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Filing: 1988-10-24
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Granted: 1991-02-26
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Expires: 2008-10-24
Abstract
Abstract A device for separating a cell-containing liquid into a cell-containing and a cell-free fraction, which device comprises an essentially elongated housing at one end of which there is provided a closable inlet, which housing contains an area for the cell-containing fraction, an area for the cell-free fraction and a membrane separator, which separator comprises a narrow feed channel through which the cell-containing liquid is passed over the wall of a separation membrane, which is formed by one or more hollow fibres which are connected at their open ends to the area for the cell-free fraction. Thus, for example, whole blood is separated very rapidly after its introduction into the device. The device may be manufactured simply and inexpensively and is pre-eminently suitable to be used for diagnostic purposes.
Inventors
- 👤 Petrus J. D. M. van Driessche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/14; B01D61/18; B01D63/00; B01D63/02; B01D63/024; B01D63/025; G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491; B01D2313/00; B01D2313/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A device for separating a cellcontaining liquid into a cell-containing fraction and a cell-free fraction, which device comprises an essentially elongated housing at one end of which there is provided a closable inlet, which housing contains a first area for receiving the cell-containing fraction, a second area located adjacent an opposite sealed end of said housing for receiving the cell-free fraction, and a membrane separator, which membrane separator comprises an enclosed narrow feed channel which is at one end in flow communication with the closable inlet for introduction of the cell-containing liquid and at the other end with the first area for receiving the cell-containing fraction which lies between said enclosed narrow feed channel and said housing, said membrane separator contains one or more hollow fibers which pass through said sealed end of the housing and at their open ends are in flow communication with the second area for receiving the cell-free fraction.
Claim 2
Independent Claim
153 words
A device for separating a cellcontaining liquid into a cell-containing fraction and a cell-free fraction, which device comprises an essentially elongated housing at one end of which there is provided a closable inlet, which housing contains a first area for receiving the cell-containing fraction, a second area located adjacent an opposite sealed end of said housing for receiving the cell-free fraction, and a membrane separator, which membrane separator comprises an enclosed narrow feed channel which is at one end in flow communication with the closable inlet for introduction of the cell-containing liquid and at the other end with the first area for receiving the cell-containing fraction which lies between said enclosed narrow feed channel and said housing, said membrane separator contains one or more hollow fibers which pass through said sealed end of the housing and at their open ends are in flow communication with the second area for receiving the cell-free fraction.
Claim 3
Dependent Claim
24 words
A device according to claim 1, wherein said one or more hollow fibers extend helically within the membrane separator about a longitudinally positioned pin.
Claim 4
Dependent Claim
32 words
A device according to claim 1, wherein both in the first area for the cell-containing fraction and in the second area for receiving the cell-free fraction there is provided a deaeration filter.
Claim 5
Dependent Claim
27 words
A device according to claim 1, wherein the housing is of a transparent material and the second area for receiving the cell-free fraction contains a diagnostic reagent.
Claim 6
Dependent Claim
23 words
A device according to claim 4, wherein the diagnostic reagent is on the wall of the second area for receiving the cell-free fraction.
References Cited (Backward Citations)
US3608730A
Cited
US3774771A
Cited
US4267053A
Cited
US4412916A
Cited
US4628036A
Cited
US4639316A
Cited
US4690754A
Cited
US4668401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |