EP0051183A1
Expired / Lapsed
EP
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Multilayer analysis element
Assignee: Fujifilm Holdings Corp
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Filing: 1981-10-15
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Granted: —
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Expires: 2001-10-15
Abstract
Abstract A dry type multilayer analysis element comprises at least one porous medium layer (50) comprising a membrane filter, to which an antigen (or antibody) is immobilized, and at least one reagent layer (20) through which a substancels) which did not participate in an antigen-antibody reaction can permeate. The multilayer analysis element is effective for assaying components present in body fluids, blood, urine, etc., in a simple manner.
Inventors
- 👤 Yutaka Akiyoshi
- 👤 Asaji Kondo
- 👤 Masao Kitajima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 22:23
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54366; G01N33/54386; G01N33/54387; G01N33/54391; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S435/97; Y10S436/00; Y10S436/807; Y10S436/81
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
In a multilayer analysis element comprising at least one porous medium layer having immobilized therein a substance capable of causing an antigen-antibody reaction and at least one reagent layer, said porous membrane layer comprises a membrane filter and said reagent layer being capable of permeating a substance(s) which did not cause the antigen-antibody reaction.
Claim 2
Dependent Claim
54 words
In a multilayer analysis element comprising at least one porous medium layer having immobilized therein a substance capable of causing an antigen-antibody reaction and at least one reagent layer, said porous membrane layer comprises a membrane filter and said reagent layer being capable of permeating a substance(s) which did not cause the antigen-antibody reaction.
Claim 3
Dependent Claim
21 words
The multilayer analysis element as claimed in claim 1 wherein said immobilization occurs in the interior of said porous medium layer.
Claim 4
Dependent Claim
30 words
The multilayer analysis element as claimed in claim 1 or 2 wherein said porous medium layer comprises a porous material having a void of from about 20 to about 90%.
Claim 5
Dependent Claim
30 words
The multilayer analysis element as claimed in claim 3'wherein said porous material is selected from the group consisting of a-membrane filter, a textile, a non-woven fabric and water permeable paper.
Claim 6
Dependent Claim
24 words
The multilayer analysis element as claimed in claim 4 wherein said textile is a plain weave formed by weaving warp and weft yarns alternately.
Claim 7
Dependent Claim
27 words
The multilayer analysis element as claimed in claim 1 or 3 wherein said porous medium layer has a thickness of about 50 µm to about 1 mm.
Claim 8
Dependent Claim
23 words
The multilayer analysis element as claimed in claim 1 wherein said reagent layer has a thickness of about 5 to about 200 um.
Claim 9
Dependent Claim
25 words
The multilayer analysis element as claimed in claim 1 wherein a radiation blocking layer is provided between said porous medium layer and said reagent layer.
Claim 10
Dependent Claim
32 words
The multilayer analysis element as claimed in claim 8 wherein said radiation blocking layer is a light reflection or absorption layer and has a thickness of about 1 to about 50 µm
Claim 11
Dependent Claim
24 words
The multilayer analysis element as claimed in claim 1 wherein 0.1 to 10 wt% of carbon black is contained in said porous medium layer.
Claim 12
Dependent Claim
31 words
The multilayer analysis element as claimed in claim 8 or 9 wherein said radiation blocking layer comprises a hydrophilic high molecular weight substance containing 0.5 to 20 wt% of carbon black.
References Cited (Backward Citations)
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