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US4452887A
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Integral multi-layered element containing glucose oxidase for determining glucose
Assignee: Fujifilm Holdings Corp
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Filing: 1982-06-17
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Granted: 1984-06-05
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Expires: 2002-06-17
Abstract
Abstract In a dry-type multilayer liquid analysis material for glucose determination composed of a transparent water-impermeable support having formed thereon in sequence at least a reagent layer containing a reactive component forming a detectable material by the action of hydrogen peroxide, a non-porous light-shielding layer, and a porous spreading layer, the coloring efficiency for colorimetry using the liquid analysis material is improved by incorporating a glucose oxidase enzyme in at least one layer disposed above the reagent layer.
Inventors
- 👤 Masao Kitajima
- 👤 Fuminori Arai
- 👤 Harumi Katsuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:10
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/54; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; G01N33/526; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
An integral multi-layered element for determining glucose in a liquid sample comprising a water-impermeable light-transmissive support having formed thereon, in sequence, a reagent layer containing a reactive component forming a detectable material by the action of hydrogen peroxide, a non-porous light-shielding layer and a porous spreading layer, wherein a glucose oxidase is incorporated in at least one layer disposed above said reagent layer.
Claim 2
Dependent Claim
63 words
An integral multi-layered element for determining glucose in a liquid sample comprising a water-impermeable light-transmissive support having formed thereon, in sequence, a reagent layer containing a reactive component forming a detectable material by the action of hydrogen peroxide, a non-porous light-shielding layer and a porous spreading layer, wherein a glucose oxidase is incorporated in at least one layer disposed above said reagent layer.
Claim 3
Dependent Claim
31 words
The element as claimed in claim 1 wherein a timing layer is formed between said reagent layer and said non-porous light-shielding layer or said layer in which glucose oxidase is incorporated.
Claim 4
Dependent Claim
25 words
The element as claimed in claim 1 or 2 wherein an adhesive layer is formed between said non-porous light-shielding layer and said porous spreading layer.
Claim 5
Dependent Claim
45 words
The element as claimed in any of claims 1 to 3 wherein said layer disposed above said reagent layer is selected from the non-porous light-shielding layer, the porous spreading layer, the timing layer, and adhesive layer, and the layer in which glucose oxidase is incorporated.
References Cited (Backward Citations)
US3992158A
Cited
US4042335A
Cited
US4144306A
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US4166093A
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US4255384A
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US4258001A
Cited
US4353984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |