US4952691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescence polarization immunoassay
Assignee: Abbott Laboratories
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Filing: 1990-01-17
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Granted: 1990-08-28
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Expires: 2010-01-17
Abstract
Abstract This disclosure relates to a method and reagents for determining ligands in biological fluids such as serum, plasma, spinal fluid, amnionic fluid and urine. In particular, this disclosure relates to a fluorescence polarization immunoassay procedure and to a novel class of tracer compounds employed as reagents in such procedures. The procedure disclosed combines the specificity of an immunoassay with the speed and convenience of fluorescence polarization techniques to provide a means for determining the amount of the specific ligand present in a sample.
Inventors
- 👤 Chao-Huei J. Wang
- 👤 Stephen D. Stroupe
- 👤 Michael E. Jolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/12; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/90; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/531; G01N33/532; G01N33/533
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A compound of the formula: ##STR27## wherein R is: ##STR28##
Claim 2
Dependent Claim
10 words
A compound of the formula: ##STR27## wherein R is: ##STR28##
References Cited (Backward Citations)
US4255329A
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US4318846A
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US4351760A
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US4481136A
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US4588697A
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US4585862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |