US4725406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for diagnostic analysis of biological fluids
Assignee: Biogenex Laboratories Inc
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Filing: 1985-10-21
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Granted: 1988-02-16
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Expires: 2005-10-21
Abstract
Abstract Apparatus for immunoassay of biological fluids, e.g. for AIDS antibodies, comprising an enclosed channel with fittings at the ends and a transparent top, together with a strip of nitrocellulose paper or other suitable material impregnated with antigens to the antibodies which are to be defected. The apparatus may have a single channel or it may have multiple channels.
Inventors
- 👤 Scott W. Compton
- 👤 James E. Stanchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:23
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/8483; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/5302; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S436/00; Y10S436/807; Y10S436/809
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
A multiple chamber assay device comprising a plurality of flat, narrow, elongated paper strips each separately impregnated at intervals with antigens selected to be reactive with antibodies, a casing formed with a corresponding plurality of rectangular cross-section chambers, each said chamber having a flat bottom dimensioned to receive one said strip extending flat longitudinally of said chamber and sides and a top, said casing being transparent so that changes in said strips may be observed through said casing, each said chamber having opposed open rectangular ends dimensioned and shaped to receive insertion of one said paper strip, removable closures at each end of each chamber, each said closure comprising an apertured cap fitting into an end, and means in each said closure co-operative with an external source to inject fluid into said chamber and discharge fluid from said chamber.
Claim 2
Dependent Claim
139 words
A multiple chamber assay device comprising a plurality of flat, narrow, elongated paper strips each separately impregnated at intervals with antigens selected to be reactive with antibodies, a casing formed with a corresponding plurality of rectangular cross-section chambers, each said chamber having a flat bottom dimensioned to receive one said strip extending flat longitudinally of said chamber and sides and a top, said casing being transparent so that changes in said strips may be observed through said casing, each said chamber having opposed open rectangular ends dimensioned and shaped to receive insertion of one said paper strip, removable closures at each end of each chamber, each said closure comprising an apertured cap fitting into an end, and means in each said closure co-operative with an external source to inject fluid into said chamber and discharge fluid from said chamber.
Claim 3
Dependent Claim
16 words
The assay device according to claim 1 in which the top is fixed and not removable.
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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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |