Patent US3939319A successfully refreshed from Google Patents.
US4046513A
Expired / Lapsed
US
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Printed reagent test devices and method of making same
Assignee: Bayer Corp
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Filing: 1976-06-30
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Granted: 1977-09-06
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Expires: 1996-06-30
Abstract
Abstract A test device for determining the presence of a constituent in a sample, and a method for making it are disclosed. The test device comprises reactants (e.g. reagents, enzymes, etc.) incorporated with a carrier matrix such that when the device is wetted with a test sample, the reactants and the constituent react to produce a detectable response. The reactants are positioned separately from each other on the matrix in substantially, discrete, non-contacting areas. Hence, reactants are maintained substantially separate from each other until the test device is wetted with the sample.
Inventors
- 👤 Leighton Clifford Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:43
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5023; B01L2200/00; B01L2200/12; B01L2200/16; B01L2300/00; B01L2300/08; B01L2300/0809; B01L2300/0825
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
In a test device for determining the presence of a constituent in a sample in which a carrier matrix is incorporated with a reagent system capable of interacting with the constituent to produce a detectable response, said system comprising at least two reactants, the improvement wherein at least two of the reactants are printed separately from each other in substantially discrete, non-contacting, substantially coplanar areas of the carrier matrix.
Claim 2
Dependent Claim
69 words
In a test device for determining the presence of a constituent in a sample in which a carrier matrix is incorporated with a reagent system capable of interacting with the constituent to produce a detectable response, said system comprising at least two reactants, the improvement wherein at least two of the reactants are printed separately from each other in substantially discrete, non-contacting, substantially coplanar areas of the carrier matrix.
Claim 3
Dependent Claim
24 words
The improvement of claim 1 in which the constituent is occult blood, one reactant is o-tolidine and another separately printed reactant is a peroxide.
Claim 4
Dependent Claim
21 words
The improvement of claim 1 in which the reactants are present on the matrix as a plurality of substantially discrete dots.
Claim 5
Dependent Claim
17 words
The improvement of claim 3 in which the dots are positioned in alternate rows of different reactants.
Claim 6
Dependent Claim
20 words
The improvement of claim 1 in which the reactants are present on the matrix as a plurality of parallel stripes.
Claim 7
Dependent Claim
14 words
The improvement of claim 5 in which the stripes alternately contain a different reactant.
Claim 8
Dependent Claim
46 words
A test device for the detection of a constituent in a bodily fluid comprising a carrier matrix having a surface, and a reagent system comprising at least two reactant materials, said materials being separately printed in discrete areas on said surface in substantially discrete, non-contacting relation.
Claim 9
Dependent Claim
46 words
A test device for the detection of a constituent in a bodily fluid comprising a carrier matrix having a surface, and a reagent system comprising at least two reactant materials, said materials being separately printed in discrete areas on said surface in substantially discrete, non-contacting relation.
Claim 10
Dependent Claim
22 words
The test device of claim 7 in which one of the printed reactant materials is an enzyme entrapped in a polymer matrix.
Claim 11
Dependent Claim
21 words
The test device of claim 7 in which one of the reactant materials is an enzyme covalently bound to a substrate.
Claim 12
Dependent Claim
15 words
The test device of claim 7 in which the discrete relation comprises a recurring pattern.
Claim 13
Dependent Claim
19 words
The test device of claim 7 in which the discrete relation comprises dots, and the carrier matrix is paper.
Claim 14
Dependent Claim
19 words
The test device of claim 7 in which the discrete relation comprises dots, and the carrier matrix is plastic.
References Cited (Backward Citations)
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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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |