Patent US4814142A successfully refreshed from Google Patents.
US4814142A
Expired / Lapsed
US
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Test strip having a non-particulate dialyzed polymer layer
Assignee: Roche Diabetes Care Inc
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Filing: 1987-05-22
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Granted: 1989-03-21
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Expires: 2007-05-22
Abstract
Abstract A diagnostic test strip for the detection of a analyte in a test fluid. The test strip has a reagent layer on a support layer. The reagent layer contains an analyte detection system in a non-particulate dialyzed latex polymer.
Inventors
- 👤 John M. Gleisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; C; C12; C12Q; C12Q1/00; C12Q1/54; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/104998
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
A diagnostic test strip for the detection of a predetermined substance in a fluid wherein the strip comprises a support having thereon a reagent layer wherein the reagent layer contains a non-particulate dialyzed latex polymer and dispersed therein a reagent detection system consisting essentially of one or more reagent compositions which react with the substance to provide a detectable change, wherein the dialyzed latex polymer constitutes at least about 60% by weight of the dry reagent layer.
Claim 2
Dependent Claim
77 words
A diagnostic test strip for the detection of a predetermined substance in a fluid wherein the strip comprises a support having thereon a reagent layer wherein the reagent layer contains a non-particulate dialyzed latex polymer and dispersed therein a reagent detection system consisting essentially of one or more reagent compositions which react with the substance to provide a detectable change, wherein the dialyzed latex polymer constitutes at least about 60% by weight of the dry reagent layer.
Claim 3
Dependent Claim
17 words
The tests strip of claim 1 wherein the dialyzed latex polymers comprises a carboxylated polyvinyl acetate/ethylene copolymer.
Claim 4
Dependent Claim
22 words
The test strip of claim 1 wherein the dialyzed latex polymer constitutes at least about 75% by weight of the reagent layer.
Claim 5
Dependent Claim
17 words
The test strip of claim 1 wherein the dialyzed latex polymer comprises a carboxylated polyvinyl acetate/ethylene copolymer.
Claim 6
Dependent Claim
18 words
The test strip of claim 4 wherein the reagent layer contains a reagent detection system for detecting glucose.
Claim 7
Dependent Claim
15 words
The test strip of claim 5 which provides a visible change when glucose is present.
Claim 8
Dependent Claim
15 words
The test strip of claim 6 wherein the visible change is a change of color.
Claim 9
Dependent Claim
60 words
A diagnostic test strip comprising a transparent support having thereon a reagent layer comprising dialyzed non-particulate carboxylated vinylacetate/ethylene copolymer and dispersed therein a reagent detection system consisting essentially of glucose oxidase, peroxidase, and a color indicator that changes color when exposed to glucose, wherein the dialyzed latex copolymer constitutes at least about 60% by weight of the dry reagent layer.
Claim 10
Dependent Claim
60 words
A diagnostic test strip comprising a transparent support having thereon a reagent layer comprising dialyzed non-particulate carboxylated vinylacetate/ethylene copolymer and dispersed therein a reagent detection system consisting essentially of glucose oxidase, peroxidase, and a color indicator that changes color when exposed to glucose, wherein the dialyzed latex copolymer constitutes at least about 60% by weight of the dry reagent layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |