Patent US4614823A successfully refreshed from Google Patents.
US4614823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminomethylfluorescein derivatives
Assignee: Abbott Laboratories
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Filing: 1984-07-11
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Granted: 1986-09-30
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Expires: 2004-07-11
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. This disclosure also relates to a novel class of tracer compounds employed as reagents in fluorescence polarization immunoassays.
Inventors
- 👤 Curtis L. Kirkemo
- 👤 Mohammed T. Shipchandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:10
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; C07J; C07J41/00; C07J41/0005; C07J41/0016; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A compound having the formula: ##STR13##
Claim 2
Dependent Claim
6 words
A compound having the formula: ##STR13##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |