Patent US3770383A successfully refreshed from Google Patents.
US3770383A
Expired / Lapsed
US
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Diagnostic test slide
Assignee: Akzona Inc
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Filing: 1971-12-30
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Granted: 1973-11-06
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Expires: 1991-12-30
Abstract
Abstract A test slide for the performance and observation of an immunochemical or diagnostic test on its surface, which surface is insoluble in, impermeable to, non-absorbent to, and wettable by, water, carries on its surface at least one circumscribed test area containing a single solid dried stable spot deposit of an immuno-chemical reagent providing a predetermined amount of an antigen or an antibody, or alternatively, a second solid dried spot of a buffer material, said spot or spots upon being moistened with a liquid and/or the liquid to be tested being reconstituted to the reagent and/or buffer, to form an observable area of reaction mixture.
Inventors
- 👤 R Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/551; G01N33/552; G01N33/54313; Y; Y10; Y10S; Y10S436/00; Y10S436/805; Y10S436/806; Y10S436/811; Y10S436/825; Y10S436/826
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
The test slide of claim 1, in which said deposited test reagent has an average diameter between about 5 and about 15 millimeters.
Claim 2
Dependent Claim
13 words
The test slide of claim 1 in which said substrate material is glass.
Claim 3
Dependent Claim
30 words
The test slide of claim 1, in which a deposited solid dried spot of an additional reagent is positioned in close proximity to said reagent deposit, within said circumscribed area.
Claim 4
Dependent Claim
32 words
The test slide of claim 1 in which said substrate material is a substantially rectangular sheet of cardboard carrying on one surface thereof a coating of a water-impermeable and water-wettable synthetic material.
Claim 5
Dependent Claim
24 words
The test slide of claim 1 in which said circumscribed test area including said test reagent is demarcated by a circle of contrasting color.
Claim 6
Dependent Claim
14 words
The test slide of claim 1 in which said carrier particles are latex particles.
Claim 7
Dependent Claim
27 words
The test slide of claim 1 in which said test reagent includes an adjuvant to bind the deposit to the surface and to promote resuspension upon moistening.
Claim 8
Dependent Claim
48 words
The test slide of claim 1 which is enclosed within a protective container comprising a base sheet of metal foil and a co-extensive cover sheet of metal foil bonded to said base sheet around the periphery of said sheets to provide a hermetic enclosure for said test slide.
References Cited (Backward Citations)
GB953414A
Cited
US3697227A
Cited
US3502437A
Cited
US3549328A
Cited
US3616251A
Cited
US3672845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |