Patent US5284622A successfully refreshed from Google Patents.
US5284622A
Expired / Lapsed
US
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Test carrier for the analysis of fluids
Assignee: Roche Diagnostics GmbH
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Filing: 1992-09-30
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Granted: 1994-02-08
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Expires: 2012-09-30
Abstract
Abstract A test carrier for the analysis of fluids has a test field which is held in a frame and a test application surface for the application of a sample fluid. Sometimes called an "analysis chip", such devices are suitable for accommodating a test layer pack which has a plurality of layers lying loosely on one another. These devices are thin and allow for low cost manufacturing and simple and efficient handling, and has a base body of a plastic material, with a trough-shaped depression for accommodating the test field therein. A retaining net of a plastic material spans above the depression and the test field.
Inventors
- 👤 Manfred Krause
- 👤 Gerd K. P. Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:58
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A test carrier for the analysis of fluids, comprising: a flat body formed of a plastic material, said base body having a trough-shaped depression disposed in one of its faces: a test field disposed in said depression, said test field having a sample application surface thereon, for the application of a sample fluid; and a retaining net formed of a plastic material spanning said depression and said test field disposed therein.
Claim 2
Dependent Claim
71 words
A test carrier for the analysis of fluids, comprising: a flat body formed of a plastic material, said base body having a trough-shaped depression disposed in one of its faces: a test field disposed in said depression, said test field having a sample application surface thereon, for the application of a sample fluid; and a retaining net formed of a plastic material spanning said depression and said test field disposed therein.
Claim 3
Dependent Claim
44 words
A test carrier for the analysis of fluids as recited in claim 1, wherein said test field comprises a test layer pack having at least two test layers loosely therein, wherein said at least two test layers are loosely disposed in a vertical stack.
Claim 4
Dependent Claim
21 words
A test carrier as recited in claim 1, wherein said retaining net covers said sample application surface of said test field.
Claim 5
Dependent Claim
62 words
A test carrier for the analysis of fluids as recited in claim 1, wherein said base body is of a thermoplastic material which softens at a temperature which does not affect the dimensional stability of the retaining net, and said base body further comprises a surface strip adjacent to said depression, and wherein said retaining net is melted into said surface strip.
Claim 6
Dependent Claim
21 words
A test carrier for the analysis of fluids as recited in claim 4, wherein said surface strip completely surrounds said depression.
Claim 7
Dependent Claim
37 words
A test carrier according to claim 1, further comprising a rim which is disposed around a top edge of the depression, said rim being disposed in a recessed portion of the upper surface of the base body.
Claim 8
Dependent Claim
77 words
A test carrier for analysis of fluids as recited in claim 1, wherein an outer perimeter of said trough-shaped depression is larger than an outer perimeter of said test field, and wherein said base body further comprises positioning means disposed within the depression for positioning said test field in said depression wherein a gap exists on all sides of the test field, between the outer perimeter of the test field and the outer perimeter of the depression.
Claim 9
Dependent Claim
27 words
A test carrier for the analysis of fluids as recited in claim 7, wherein said gap is at least 0.3 mm and at most 1 mm wide.
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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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |