Patent US4042335A successfully refreshed from Google Patents.
US4042335A
Expired / Lapsed
US
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Integral element for analysis of liquids
Assignee: Eastman Kodak Co
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Filing: 1976-06-25
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Granted: 1977-08-16
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Expires: 1996-06-25
Abstract
Abstract The present invention concerns a multilayer element for the analysis of liquids such as biochemical and biological liquids. Elements according to the invention include (1) a reagent layer including a composition that is interactive in the presence of a predetermined substance to be analyzed (analyte) to provide a diffusible, detectable species, and (2) a registration layer that is permeable to the detectable species and within which such species, e.g., a dye, can be detected. Also within the element, preferably between the reagent layer and the registration layer, there can be a radiation-blocking layer, such as an opaque reflecting layer, to enhance detection of the diffusible species within the registration layer. The element can also include a spreading layer, preferably separated from the registration layer by a reagent layer. In operation, a sample of liquid under analysis is applied to the reagent layer of the element or, if present, to a spreading layer. If the sample contains analyte that the element is intended to detect, chemical reaction or other interaction within the reagent layer provides a detectable species that diffuses, via any intervening layers such as a radiation-blocking layer, into the registration layer for detection there, such as by radiometric techniques like reflection spectrophotometry.
Inventors
- 👤 Pierre L. Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/54; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
81 words
An integral element for analysis of liquids, the element comprising, a reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a non-fibrous radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material, wherein the radiation-blocking layer is interposed between the registration layer and the reagent layer.
Claim 2
Dependent Claim
81 words
An integral element for analysis of liquids, the element comprising, a reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a non-fibrous radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material, wherein the radiation-blocking layer is interposed between the registration layer and the reagent layer.
Claim 3
Dependent Claim
100 words
An integral element for analysis of liquids, the element comprising a radiation-transmissive support having thereon, a reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a non-fibrous radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material, wherein the registration layer is interposed between the support and the radiation-blocking layer and the radiation-blocking layer is interposed between the registration layer and the reagent layer.
Claim 4
Dependent Claim
100 words
An integral element for analysis of liquids, the element comprising a radiation-transmissive support having thereon, a reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a non-fibrous radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material, wherein the registration layer is interposed between the support and the radiation-blocking layer and the radiation-blocking layer is interposed between the registration layer and the reagent layer.
Claim 5
Dependent Claim
30 words
An integral element as described in claim 2 wherein the reagent layer and the registration layer are water-swellable and wherein the opacifying agent in the radiation-blocking layer comprises a pigment.
Claim 6
Dependent Claim
42 words
An integral element as described in claim 3 wherein the reagent layer comprises a hydrophilic colloid having the interactive material distributed therein, the radiation-blocking layer comprises a hydrophilic colloid having a pigment distributed therein and the registration layer comprises a hydrophilic colloid.
Claim 7
Dependent Claim
20 words
An integral element as described in claim 4 wherein the registration layer further comprises a mordant for the detectable species.
Claim 8
Dependent Claim
77 words
An integral element for analysis of liquids, the element comprising, an isotropically porous spreading layer comprising a non-fibrous material, a reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material wherein the reagent layer is interposed between the registration layer and the spreading layer.
Claim 9
Dependent Claim
77 words
An integral element for analysis of liquids, the element comprising, an isotropically porous spreading layer comprising a non-fibrous material, a reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material wherein the reagent layer is interposed between the registration layer and the spreading layer.
Claim 10
Dependent Claim
95 words
An integral element for analysis of liquids, the element comprising a radiation-transmissive support having thereon, an isotropically porous spreading layer comprising a non-fibrous material, a reagent layer comprising a composition comprising material interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material, wherein the registration layer is interposed between the support and the reagent layer and the reagent layer is interposed between the registration layer and the spreading layer.
Claim 11
Dependent Claim
95 words
An integral element for analysis of liquids, the element comprising a radiation-transmissive support having thereon, an isotropically porous spreading layer comprising a non-fibrous material, a reagent layer comprising a composition comprising material interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a non-fibrous material, wherein the registration layer is interposed between the support and the reagent layer and the reagent layer is interposed between the registration layer and the spreading layer.
Claim 12
Dependent Claim
33 words
An integral element as described in claim 7, further comprising a non-fibrous radiation-blocking layer, permeable to the detectable species, comprising an opacifying agent and interposed between the registration layer and the reagent layer.
Claim 13
Dependent Claim
125 words
An integral element for analysis of liquids the element comprising a radiation-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a non-fibrous material, a water-swellable reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a non-fibrous, radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a water-swellable, non-fibrous material, wherein the registration layer is the closest to the support of said layers the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 14
Dependent Claim
125 words
An integral element for analysis of liquids the element comprising a radiation-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a non-fibrous material, a water-swellable reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a non-fibrous, radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, and a radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a water-swellable, non-fibrous material, wherein the registration layer is the closest to the support of said layers the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 15
Dependent Claim
126 words
An integral element for analysis of liquids, the element comprising a radiation-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a non-fibrous polymeric composition or particulate matter, a water-swellable reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible detectable species, a non-fibrous radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, and a water-swellable, non-fibrous radiation-transmissive registration layer, permeable to the detectable species and within which said species can be detected, wherein the registration layer is the closest to the support of said layers, the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 16
Dependent Claim
126 words
An integral element for analysis of liquids, the element comprising a radiation-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a non-fibrous polymeric composition or particulate matter, a water-swellable reagent layer comprising a composition that is interactive in the presence of a predetermined analyte to provide a diffusible detectable species, a non-fibrous radiation-blocking layer, permeable to the detectable species and comprising an opacifying agent, and a water-swellable, non-fibrous radiation-transmissive registration layer, permeable to the detectable species and within which said species can be detected, wherein the registration layer is the closest to the support of said layers, the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 17
Dependent Claim
16 words
An integral element as described in claim 10 wherein the spreading layer comprises a blushed polymer.
Claim 18
Dependent Claim
29 words
An integral element as described in claim 10 wherein the spreading layer comprises particulate matter comprising a pigment, a colloid derived from a polymer, glass beads or resinous beads.
Claim 19
Dependent Claim
21 words
An integral element as described in claim 10 wherein the opacifying agent in the radiation-blocking layer comprises a water-resistant, blushed polymer.
Claim 20
Dependent Claim
19 words
An integral element as described in claim 9 wherein the opacifying agent in the radiation-blocking layer comprises a pigment.
Claim 21
Dependent Claim
138 words
An integral element for analysis of liquids, the element comprisng a radiation-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a blushed polymer and a surfactant, a reagent layer comprising a water-swellable hydrophilic colloid having distributed therein a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a radiation-blocking layer permeable to the detectable species and comprising a hydrophilic colloid having a pigment distributed therein, and a water-swellable, radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a hydrophilic colloid, wherein the registration layer is the closest to the support of said layers the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 22
Dependent Claim
138 words
An integral element for analysis of liquids, the element comprisng a radiation-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a blushed polymer and a surfactant, a reagent layer comprising a water-swellable hydrophilic colloid having distributed therein a composition that is interactive in the presence of a predetermined analyte to provide a diffusible, detectable species, a radiation-blocking layer permeable to the detectable species and comprising a hydrophilic colloid having a pigment distributed therein, and a water-swellable, radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a hydrophilic colloid, wherein the registration layer is the closest to the support of said layers the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 23
Dependent Claim
20 words
An integral element as described in claim 15 wherein the registration layer further comprises a mordant for the detectable species.
Claim 24
Dependent Claim
17 words
An integral element as described in claim 15 wherein the spreading layer additionally comprises an inorganic pigment.
Claim 25
Dependent Claim
206 words
An integral element for analysis of liquids, the element comprising a radition-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a blushed polymer selected from cellulose acetate and a polyamide, an inorganic pigment and a surfactant, a water-swellable reagent layer comprising a hydrophilic colloid selected from gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), an acrylamide, agarose and a polysaccharide, said colloid having distributed therein a composition that is interactive in the presence of a predetermined analyte to provide a diffusible detectable species, a radiation-blocking layer, permeable to the detectable species and comprising a hydrophilic colloid selected from gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), an acrylamide, agarose and a polysaccharide, said colloid having distributed therein a pigment selected from carbon, titanium dioxide and barium sulfate and a water-swellable, radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a hydrophilic colloid selected from gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), an acrylamide, agarose and a polysaccharide, and a mordant for the detectable species, wherein the registration layer is the closest to the support of said layers, the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 26
Dependent Claim
206 words
An integral element for analysis of liquids, the element comprising a radition-transmissive support having thereon, a water-resistant, isotropically porous spreading layer comprising a blushed polymer selected from cellulose acetate and a polyamide, an inorganic pigment and a surfactant, a water-swellable reagent layer comprising a hydrophilic colloid selected from gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), an acrylamide, agarose and a polysaccharide, said colloid having distributed therein a composition that is interactive in the presence of a predetermined analyte to provide a diffusible detectable species, a radiation-blocking layer, permeable to the detectable species and comprising a hydrophilic colloid selected from gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), an acrylamide, agarose and a polysaccharide, said colloid having distributed therein a pigment selected from carbon, titanium dioxide and barium sulfate and a water-swellable, radiation-transmissive registration layer, permeable to the detectable species, within which said species can be detected and comprising a hydrophilic colloid selected from gelatin, poly(vinyl alcohol), poly(vinyl pyrrolidone), an acrylamide, agarose and a polysaccharide, and a mordant for the detectable species, wherein the registration layer is the closest to the support of said layers, the radiation-blocking layer is interposed between the reagent layer and the registration layer, and the reagent layer is interposed between the radiation-blocking layer and the spreading layer.
Claim 27
Dependent Claim
41 words
An integral element as described in claim 18 wherein the composition in the reagent layer comprises glucose oxidase, peroxidase and an indicator composition comprising a compound oxidizable in the presence of hydrogen peroxide and peroxidase to effect formation of a dye.
Claim 28
Dependent Claim
38 words
An integral element as described in claim 19 wherein the indicator composition comprises aminoantipyrene chlorohydrate and 1-naphthol-2-sulfonic acid sodium salt and the mordant in the registration layer comprises a copolymer comprising recurring units of styrene and N,n-dimethyl-N-benzyl-3-maleimidopropylammonium chloride.
References Cited (Backward Citations)
US3092465A
Cited
US3243303A
Cited
US3526480A
Cited
US3672845A
Cited
US3847553A
Cited
US3791933A
Cited
US3723064A
Cited
US3897214A
Cited
US3901657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |