Patent US4551306A successfully refreshed from Google Patents.
US4551306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed reagent matrix
Assignee: Bayer Corp
•
Filing: 1983-05-20
•
Granted: 1985-11-05
•
Expires: 2003-05-20
Abstract
Abstract Edges of reagent matrix are sealed such that liquid present in the reagent matrix material is retained therein and prevented from running over into another reagent matrix area present on the same reagent test device.
Inventors
- 👤 Dale W. Bouwman
- 👤 Harold K. Clayborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:34
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
A reagent test device comprising multiple reagent carrier matrices attached in spaced relationship to one side of a substrate, said reagent carrier matrices being impregnated with water repellent material on opposing facing edges in an amount sufficient to seal opposing facing edges to prevent liquid run-over between adjoining spaced carrier matrices.
Claim 2
Dependent Claim
51 words
A reagent test device comprising multiple reagent carrier matrices attached in spaced relationship to one side of a substrate, said reagent carrier matrices being impregnated with water repellent material on opposing facing edges in an amount sufficient to seal opposing facing edges to prevent liquid run-over between adjoining spaced carrier matrices.
Claim 3
Dependent Claim
14 words
The test device of claim 1 in which the carrier matrix is filter paper.
Claim 4
Dependent Claim
12 words
The test device of claim 1 in which the substrate is polystyrene.
Claim 5
Dependent Claim
14 words
The test device of claim 1 in which the water repellent material is paraffin.
Claim 6
Dependent Claim
15 words
The test device of claim 1 in which the water repellent material is an oil.
Claim 7
Dependent Claim
14 words
The test device of claim 1 in which the water repellent material is silicone.
Claim 8
Dependent Claim
48 words
A reagent test device comprising multiple reagent carrier matrices of filter paper attached in spaced relationship to one side of a polystyrene substrate, said reagent carrier matrices being impregnated with paraffin on opposing facing edges in an amount sufficient to seal on opposing facing edges of said matrices.
Claim 9
Dependent Claim
48 words
A reagent test device comprising multiple reagent carrier matrices of filter paper attached in spaced relationship to one side of a polystyrene substrate, said reagent carrier matrices being impregnated with paraffin on opposing facing edges in an amount sufficient to seal on opposing facing edges of said matrices.
References Cited (Backward Citations)
US3232710A
Cited
US3001915A
Cited
US3006735A
Cited
US3443903A
Cited
US3715192A
Cited
US4160008A
Cited
US4301115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |