EP0331174A1
Expired / Lapsed
EP
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Leukocyte separator and method of making the same
Assignee: Terumo Corp
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Filing: 1989-03-02
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Granted: —
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Expires: 2009-03-02
Abstract
Abstract A leukocyte separator for trapping and separating leukocytes from blood is made of a porous material having a bubble point ranging from 0.08 to 0.3 kg/cm² and a thickness of at least 0.30 mm. The leukocyte separator is manufactured by pressing a porous material having a bubble point smaller than 0.13 kg/cm² to produce a porous material having a thickness of at least 0.3 mm and a bubble point ranging from 0.13 to 0.3 kg/cm².
Inventors
- 👤 Keiji C/O Terumo Kabushiki Kaisha Naoi
- 👤 Katsuhiko C/O Terumo Kabushiki Kaisha Iwata
- 👤 Osamu C/O Terumo Kabushiki Kaisha Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 18:03
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M1/3633; A61M1/34; A61M1/3472; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1669; B01D39/1676; B01D69/00; B01D69/02; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0439; A61M2205/00; A61M2205/75; A61M2207/00; B01D2239/00; B01D2239/06; B01D2239/0604; B01D2239/0618; B01D2239/065; B01D2239/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
A leukocyte separator for trapping and separating leukocytes from blood, said leukocyte separator being made of a porous material having a bubble point ranging from 0.08 to 0.3 kg/cm² and a thickness of at least 0.30 mm.
Claim 2
Dependent Claim
37 words
A leukocyte separator for trapping and separating leukocytes from blood, said leukocyte separator being made of a porous material having a bubble point ranging from 0.08 to 0.3 kg/cm² and a thickness of at least 0.30 mm.
Claim 3
Dependent Claim
17 words
A leukocyte separator according to claim 1, wherein said bubble point ranges from 0.13 to 0.25 kg/cm².
Claim 4
Dependent Claim
15 words
A leukocyte separator according to claim 1, wherein said thickness is at least 0.5 mm.
Claim 5
Dependent Claim
14 words
A leukocyte separator according to claim 1, wherein said porous material comprises polyvinyl alcohol.
Claim 6
Dependent Claim
14 words
A leukocyte separator according to claim 1, wherein said porous material comprises polyurethane foam.
Claim 7
Independent Claim
55 words
A method of manufacturing a leukocyte separator for trapping and separating leukocytes from blood, said method comprising the step of pressing a porous material having a bubble point smaller than 0.13 kg/cm² to produce a porous material having a thickness of at least 0.3 mm and a bubble point ranging from 0.13 to 0.3 kg/cm².
Claim 8
Independent Claim
55 words
A method of manufacturing a leukocyte separator for trapping and separating leukocytes from blood, said method comprising the step of pressing a porous material having a bubble point smaller than 0.13 kg/cm² to produce a porous material having a thickness of at least 0.3 mm and a bubble point ranging from 0.13 to 0.3 kg/cm².
Claim 9
Dependent Claim
34 words
A method according to claim 6, further compris ing the step of holding said first-mentioned porous material under a pressure of about 400 kg/cm² at a temperature of about 80°C for about 3 minutes.
References Cited (Backward Citations)
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