US5556789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the simultaneous determination of several analytes
Assignee: Roche Diagnostics GmbH
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Filing: 1994-07-01
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Granted: 1996-09-17
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Expires: 2014-07-01
Abstract
Abstract Device for the determination of analytes having a sample application point, several separate sample withdrawal zones that are each connected with the sample application point by one capillary transport path and that have several test elements for the individual determination of analytes wherein a retardation zone is provided on at least one of the transport paths. Material for the capillary transport of a liquid sample defines a sample application zone and a plurality of sample withdrawal zones connected to said application zone by a like plurality of transport paths. At least one of said paths has a retardation zone which assures that liquid applied to said application zone arrives simultaneously at said withdrawal zones, regardless of the lengths of the paths.
Inventors
- 👤 Ada Goerlach-Graw
- 👤 Reinhard Baer
- 👤 Rolf Lerch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:21
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5023; B01L2300/00; B01L2300/08; B01L2300/0809; B01L2300/0816; B01L2300/0861; B01L2300/0864; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0406; B01L2400/08; B01L2400/084; Y; Y10; Y10S; Y10S436/00; Y10S436/807; Y10S436/901
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
Device for delivery of a liquid sample to multiple withdrawal zones at substantially the same time, said device comprising a plurality of sample withdrawal zones, fibrous capillary active transport means comprising a sample application zone and a plurality of transport paths connecting respective said sample withdrawal zones to said sample application zone, said fibrous capillary active transport means being free of reagents which react with analytes to be determined, and retardation means provided in at least one of said transport paths and arranged so that liquid sample applied to said sample application zone arrives simultaneously at each of said sample withdrawal zones.
Claim 2
Dependent Claim
102 words
Device for delivery of a liquid sample to multiple withdrawal zones at substantially the same time, said device comprising a plurality of sample withdrawal zones, fibrous capillary active transport means comprising a sample application zone and a plurality of transport paths connecting respective said sample withdrawal zones to said sample application zone, said fibrous capillary active transport means being free of reagents which react with analytes to be determined, and retardation means provided in at least one of said transport paths and arranged so that liquid sample applied to said sample application zone arrives simultaneously at each of said sample withdrawal zones.
Claim 3
Dependent Claim
14 words
Device as in claim 1 wherein said transport paths all have the same length.
Claim 4
Dependent Claim
15 words
Device as in claim 1 wherein said transport paths extend radially from said application zone.
Claim 5
Dependent Claim
15 words
Device as in claim 1 wherein said transport paths do not have the same length.
Claim 6
Dependent Claim
51 words
Device as in claim 4 wherein at least one of said transport paths does not have retardation means therein, said retardation means in the at least one of the other transport paths comprising a smaller cross section than the cross section of said at least one transport path without retardation means.
Claim 7
Dependent Claim
34 words
Device as in claim 4 wherein said retardation means comprises fibrous capillary active material that retards liquid transport as compared to the rest of the transport path in which said retardation means is provided.
Claim 8
Dependent Claim
35 words
Device as in claim 1 wherein said transport paths do not all have the same length, said paths including a shortest path having retardation means and at least one longer path having no retardation means.
Claim 9
Dependent Claim
15 words
Device as in claim 1 wherein said fibrous capillary active transport means is a fleece.
Claim 10
Dependent Claim
15 words
Device as in claim 1 wherein said fibrous capillary active transport means is a fabric.
Claim 11
Dependent Claim
150 words
Method for the determination of several analytes contained in a liquid sample, said method comprising the steps of providing fibrous capillary active transport means comprising a sample application zone, plurality of sample withdrawal zones spaced from said sample application zone, a plurality of transport paths connecting respective said sample withdrawal zones to said sample application zone, and retardation means provided in at least one of said transport paths and arranged so that liquid sample applied to said sample application zone arrives simultaneously at each of said sample withdrawal zones, and wherein said fibrous capillary active transport means is free of reagents which react with analytes to be determined, applying liquid sample comprising analytes to said application zone, contacting test elements containing reagents to at least two of said sample withdrawl zones, said reagents reacting with said analytes to produce observable results, and determining said analytes in accordance with said results.
Claim 12
Dependent Claim
150 words
Method for the determination of several analytes contained in a liquid sample, said method comprising the steps of providing fibrous capillary active transport means comprising a sample application zone, plurality of sample withdrawal zones spaced from said sample application zone, a plurality of transport paths connecting respective said sample withdrawal zones to said sample application zone, and retardation means provided in at least one of said transport paths and arranged so that liquid sample applied to said sample application zone arrives simultaneously at each of said sample withdrawal zones, and wherein said fibrous capillary active transport means is free of reagents which react with analytes to be determined, applying liquid sample comprising analytes to said application zone, contacting test elements containing reagents to at least two of said sample withdrawl zones, said reagents reacting with said analytes to produce observable results, and determining said analytes in accordance with said results.
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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) | 1999-09-17 | 2000-03-18 | 2000-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-17 | 2004-03-18 | 2004-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-17 | 2008-03-18 | 2008-09-17 | $7700.00 | Window Closed / Lapsed |