Patent US4270920A successfully refreshed from Google Patents.
US4270920A
Expired / Lapsed
US
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Integrated material for chemical analysis and a method of using the same
Assignee: Fujifilm Holdings Corp
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Filing: 1979-08-31
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Granted: 1981-06-02
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Expires: 1999-08-31
Abstract
Abstract An integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and a method for analyzing blood using the same.
Inventors
- 👤 Asaji Kondo
- 👤 Fuminori Arai
- 👤 Masao Kitajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:04
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
63 words
An integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer.
Claim 2
Dependent Claim
63 words
An integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer.
Claim 3
Dependent Claim
26 words
The integrated material of claim 1, wherein said reagent layer units are in the shape of sectors radially arranged around the center of the spreading circle.
Claim 4
Dependent Claim
16 words
The integrated material of claim 2, wherein said sectors are in radial contact with one another.
Claim 5
Dependent Claim
26 words
The integrated material of claim 1, wherein said reagent layer units are in the shape of triangles radially arranged around the center of the spreading circle.
Claim 6
Dependent Claim
16 words
The integrated material of claim 4, wherein said triangles are in radial contact with one another.
Claim 7
Dependent Claim
26 words
The integrated material of claim 1, wherein said reagent layer units are in the shape of circles radially arranged around the center of the spreading circle.
Claim 8
Dependent Claim
24 words
The integrated material of claim 1, wherein said reagent layer units have different shapes such that they can be easily identified from one another.
Claim 9
Dependent Claim
24 words
The integrated material of claim 1, wherein said reagent layer units are in contact with one another and located entirely within the spreading circle.
Claim 10
Dependent Claim
14 words
The integrated material of claim 1, wherein said reagent layer units have equal areas.
Claim 11
Dependent Claim
26 words
The integrated material of claim 1, wherein said porous spreading layer is divided into porous spreading layer units corresponding to each of the reagent layer units.
Claim 12
Dependent Claim
12 words
The integrated material of claim 1, which additionally comprises a filter layer.
Claim 13
Dependent Claim
20 words
The integrated material of claim 1, wherein said material additionally comprises a waterproof layer having at least one opening therein.
Claim 14
Dependent Claim
17 words
The integrated material of claim 12, wherein said opening corresponds to the center of the spreading circle.
Claim 15
Dependent Claim
14 words
The integrated material of claim 1, wherein said material additionally comprises a radiation-blocking layer.
Claim 16
Dependent Claim
30 words
The integrated material of claim 1, wherein at least one of said reagent layer units contains a reagent for the analysis of glucose, urea nitrogen, amylase, bilirubin, albumin, and cholesterol.
Claim 17
Dependent Claim
35 words
The integrated material of claim 1, wherein said reagent layer units contain reagents which react with chemical components of the liquid test sample to cause a change in the color value of the reagent layer.
Claim 18
Independent Claim
92 words
A method of chemical analysis which comprises applying one or more drops of a liquid test sample to the spreading layer of an integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and colorimetrically analyzing said reagent layer units.
Claim 19
Independent Claim
92 words
A method of chemical analysis which comprises applying one or more drops of a liquid test sample to the spreading layer of an integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and colorimetrically analyzing said reagent layer units.
Claim 20
Independent Claim
89 words
A method for chemically analyzing blood which comprises applying a sample of blood to the porous spreading layer of an integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and colorimetrically analyzing said reagent layer units.
Claim 21
Independent Claim
89 words
A method for chemically analyzing blood which comprises applying a sample of blood to the porous spreading layer of an integrated material for chemical analysis comprising three or more reagent layer units on a support and a porous spreading layer, said units containing reagents for different chemical analyses and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and colorimetrically analyzing said reagent layer units.
Claim 22
Dependent Claim
14 words
The method of claim 18, wherein said sample is a sample of whole blood.
Claim 23
Dependent Claim
32 words
The method of claim 18, wherein said reagent layer units contain reagents which react with chemical components of the blood to produce a change in the color value of the reagent layer.
Claim 24
Dependent Claim
88 words
An integrated material for chemical analysis comprising in order on a support, three or more reagent layer units, a unitary, porous spreading layer overlaying each of said units, and a waterproof layer having at least one opening therein overlaying said spreading layer, each of said units containing a reagent for a different chemical analysis and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer.
Claim 25
Dependent Claim
88 words
An integrated material for chemical analysis comprising in order on a support, three or more reagent layer units, a unitary, porous spreading layer overlaying each of said units, and a waterproof layer having at least one opening therein overlaying said spreading layer, each of said units containing a reagent for a different chemical analysis and being proximately arranged on a support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer.
Claim 26
Dependent Claim
18 words
The integrated material of claim 21 wherein a single centrally located opening is present in said waterproof layer.
Claim 27
Dependent Claim
26 words
The integrated material of claim 22 wherein said reagent layer units are in the shape of sectors radially arranged around the center of the spreading circle.
Claim 28
Independent Claim
117 words
A method of chemical analysis which comprises applying one or more drops of a liquid test sample to the spreading layer of an integrated material for chemical analysis comprising in order on a support, three or more reagent layer units, a unitary, porous spreading layer overlaying each of said units, and a waterproof layer having at least one opening therein overlaying said spreading layer, each of said units containing a reagent for a different chemical analysis and being proximately arranged on the support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and colorimetrically analyzing said reagent layer units.
Claim 29
Independent Claim
117 words
A method of chemical analysis which comprises applying one or more drops of a liquid test sample to the spreading layer of an integrated material for chemical analysis comprising in order on a support, three or more reagent layer units, a unitary, porous spreading layer overlaying each of said units, and a waterproof layer having at least one opening therein overlaying said spreading layer, each of said units containing a reagent for a different chemical analysis and being proximately arranged on the support such that approximately equal portions thereof are within a spreading circle defined by the diffusion of a liquid sample as it passes through the porous spreading layer, and colorimetrically analyzing said reagent layer units.
Claim 30
Dependent Claim
18 words
The method of claim 24 wherein a single centrally located opening is present in said said waterproof layer.
Claim 31
Dependent Claim
25 words
The method of claim 25 wherein said reagent layer units are in the shape of sectors radially arranged around the center of the spreading circule.
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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |