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US4604264A
Expired / Lapsed
US
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Test strips
Assignee: Roche Diagnostics GmbH
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Filing: 1983-12-13
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Granted: 1986-08-05
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Expires: 2003-12-13
Abstract
Abstract A test strip has a reagent-containing film layer coating embedded at least preponderantly on and into only one side of a carrier layer made of a multifilar fabric or fleece.
Inventors
- 👤 Anselm Rothe
- 👤 Wolfgang-Reinhold Knappe
- 👤 Heinz-Friedrich Trasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
57 words
A test strip, comprising: a carrier layer made of one of a multifilar fabric and fleece; a dry, reagent-containing film layer coatingly embedded at least preponderantly on and into only one side of the carrier layer; and a synthetic resin film on the other side of the carrier layer from the preponderance of the reagent film layer.
Claim 2
Dependent Claim
57 words
A test strip, comprising: a carrier layer made of one of a multifilar fabric and fleece; a dry, reagent-containing film layer coatingly embedded at least preponderantly on and into only one side of the carrier layer; and a synthetic resin film on the other side of the carrier layer from the preponderance of the reagent film layer.
Claim 3
Dependent Claim
23 words
The test strip of claim 1, wherein the reagent film layer has a thickness, when dry, of from about 15μ to about 100μ.
Claim 4
Dependent Claim
21 words
The test strip of claim 1, and further comprising an absorbent layer between the carrier layer and the synthetic resin film.
Claim 5
Dependent Claim
23 words
The test strip of claim 3, wherein the reagent film layer has a thickness, when dry, of from about 15μ to about 100μ.
Claim 6
Dependent Claim
26 words
The test strip of claim 3, and further comprising a thin mesh covering the reagent film layer and fixing the layers to the synthetic resin film.
Claim 7
Dependent Claim
23 words
The test strip of claim 5, wherein the reagent film layer has a thickness, when dry, of from about 15μ to about 100μ.
Claim 8
Dependent Claim
43 words
The test strip of claim 3, and further comprising means fixing only one edge of the carrier layer to the synthetic resin film for bringing the reagent film layer into contact with liquid from the absorbent layer only by pressing the layers together.
Claim 9
Dependent Claim
23 words
The test strip of claim 7, wherein the reagent film layer has a thickness, when dry, of from about 15μ to about 100μ.
Claim 10
Dependent Claim
19 words
The test strip of claim 7, and further comprising a covering film layer lying over the reagent film layer.
Claim 11
Dependent Claim
23 words
The test strip of claim 9, wherein the reagent film layer has a thickness, when dry, of from about 15μ to about 100μ.
Claim 12
Dependent Claim
20 words
The test strip of claim 9, wherein the covering film layer is transparent and attached to the reagent film layer.
Claim 13
Dependent Claim
23 words
The test strip of claim 11, wherein the reagent film layer has a thickness, when dry, of from about 15μ to about 100μ.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |