US3990850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic test card
Assignee: Akzona Inc
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Filing: 1976-01-06
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Granted: 1976-11-09
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Expires: 1996-01-06
Abstract
Abstract A novel test card adapted for the performance of an immunochemical, diagnostic or serological test upon its surface, and which is provided with an end flap which may be folded over to enclose and preserve the test results. The flap portion is provided with circular openings which when folded over, are in registry with circular test areas on the surface of the card, permitting visual observation of the test results. The card may be used, for example, for blood group typing.
Inventors
- 👤 Stephen B. Friedman
- 👤 Mel J. Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:55
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/80
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A test card for performing immunochemical, diagnostic, or serological tests on the surface thereof, comprising: a. a substantially plane strip of a substrate material having at least one test surface thereof which is substantially insoluble in, impermeable to, nonabsorbent to, and wettable by water, and including a main body and a foldable end portion joined to said main body along a fold line; b. said main body having on said test surface at least one circumscribed test area containing at least one deposited dried aqueous reagent providing a predetermined amount of a test reagent, which upon being moistened is reconstituted to said test reagent; c. said end portion forming a flap provided with at lease one opening positioned in such manner that when said flap is folded over onto said main body, said opening is in registry with said test area, permitting viewing of the test area contents.
Claim 2
Dependent Claim
148 words
A test card for performing immunochemical, diagnostic, or serological tests on the surface thereof, comprising: a. a substantially plane strip of a substrate material having at least one test surface thereof which is substantially insoluble in, impermeable to, nonabsorbent to, and wettable by water, and including a main body and a foldable end portion joined to said main body along a fold line; b. said main body having on said test surface at least one circumscribed test area containing at least one deposited dried aqueous reagent providing a predetermined amount of a test reagent, which upon being moistened is reconstituted to said test reagent; c. said end portion forming a flap provided with at lease one opening positioned in such manner that when said flap is folded over onto said main body, said opening is in registry with said test area, permitting viewing of the test area contents.
Claim 3
Dependent Claim
15 words
The test card of claim 1 in which said test areas are circular in configuration.
Claim 4
Dependent Claim
36 words
The test card of claim 1 in which said openings in said flap portion are circular in configuration and of approximately the diameter of test areas on said main body which are also circular in configuration.
Claim 5
Dependent Claim
28 words
The test card of claim 1 in which there are two test areas on the main body, each enclosing a dried spot of blood type antiserum test reagent.
Claim 6
Dependent Claim
20 words
The test card of claim 1 in which said flap is integral with the main body of the test card.
Claim 7
Dependent Claim
42 words
The test card of claim 1 in which said flap portion has bonded to the lower side thereof a transparent sheet layer to permit viewing of the test results when the flap is folded over onto the main body of the card.
Claim 8
Dependent Claim
24 words
The test card of claim 1 in which the upper surface of said flap portion is coated with a layer of an adhesive material.
Claim 9
Dependent Claim
42 words
The test card of claim 1 in which said flap portion has mounted on the upper surface a layer of an absorbent sheet provided with circular openings of slightly smaller diameter and in registry with the corresponding openings in said flap portion.
Claim 10
Dependent Claim
45 words
The test card of claim 1 in which said flap portion is further provided with a layer of strippable material extending over and slightly beyond the outer edge of the upper surface thereof, which is removable to expose an adhesive layer on said flap surface.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |