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EP0155003A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Filtering unit for removing leukocytes

Assignee: Asahi Kasei Medical Co Ltd
•
Filing: 1985-03-14
•
Granted: —
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Expires: 2005-03-14
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Abstract

Abstract A filter unit for removing leukocytes from a leukocyte-containing suspension, comprising a container provided with at least one inlet conduit means and at least one outlet conduit means, the container having a main filter packed therein in the form of a non-woven fabric which comprises fibers of an average diameter of from 0.3 µm to less than 3µm and which has a bulk density of from 0.01 g/cm 3 to 0.7 g/cm 3 , and which has an average distance between two adjacent fibers defined by the following equation (1) of from 0.5 µm to 7.0 µm: wherein y is an average distance between two adjacent fibers in micron; x is an average diameter of fibers in micron; e is a density of the fibers in g/cm 3 ; D is a bulk density of the filter in g/cm 3 ; and π is a circular constant.

Inventors

  • 👤 Hiroyuki Watanabe
  • 👤 Hiroshi Rikumaru

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 19:48
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; A; A61; A61M; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0439

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 148 words
A filter unit for removing leukocytes from a leukocyte-containing suspension, comprising a container provided with at least one inlet conduit means and at least one outlet conduit means, the container having a main filter packed therein in the form of a non-woven fabric which comprises fibers having an average diameter of from 0.3 µm to less than 3 µm and which has a bulk density of from 0.01 g/cm 3 to 0.7 g/cm 3 , and which has an average distance between two adjacent fibers defined by the following equation (1) of from 0.5 µm to 7.0 pm: wherein y is an average distance between two adjacent fibers in micron; x is an average diameter of fibers in micron; p is a density of the fibers in g/cm 3 ; D is a bulk density of the filter in g/cm 3 ; and π is a cuircular constant.
Claim 2
Dependent Claim 148 words
A filter unit for removing leukocytes from a leukocyte-containing suspension, comprising a container provided with at least one inlet conduit means and at least one outlet conduit means, the container having a main filter packed therein in the form of a non-woven fabric which comprises fibers having an average diameter of from 0.3 µm to less than 3 µm and which has a bulk density of from 0.01 g/cm 3 to 0.7 g/cm 3 , and which has an average distance between two adjacent fibers defined by the following equation (1) of from 0.5 µm to 7.0 pm: wherein y is an average distance between two adjacent fibers in micron; x is an average diameter of fibers in micron; p is a density of the fibers in g/cm 3 ; D is a bulk density of the filter in g/cm 3 ; and π is a cuircular constant.
Claim 3
Dependent Claim 27 words
A filter unit according to claim 1, wherein the prefilter for separating storage generated microaggregates and adhesive substances is placed on the main filter at the inlet-side.
Claim 4
Dependent Claim 24 words
A filter unit according to claim 1 or claim 2, wherein the thickness of the main filter is from 1 mm to 30 mm.
Claim 5
Dependent Claim 36 words
A filter unit according to claim 1 or claim 2, wherein the area of the surface of the main filter at the inlet-side in the container is from 10 cm 2 to 2000 cm 2 .
Claim 6
Dependent Claim 20 words
A filter unit according to claim 2, wherein the thickness of the prefilter is from 1 mm to 30 mm.
Claim 7
Dependent Claim 32 words
A filter unit according to claim 2, wherein the area of the surface of the prefilter at the inlet-side in the container is from 10 cm 2 to 2000 cm 2 .

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