US4331759A
Expired / Lapsed
US
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Composition suitable for testing biological tissues and/or liquids, and the method of use
Assignee: Eni SpA
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Filing: 1980-07-03
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Granted: 1982-05-25
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Expires: 2000-07-03
Abstract
Abstract The invention relates to a composition suitable for testing biological tissues and/or liquids, the composition consisting of: (a) a dye chosen from the xanthene, azine, oxazine or acridine series, or from water-soluble dyes of the "diazo" series, or triphenylmethane, (b) a medium compatible with the biological tissue and/or liquid, (c) a substance capable of rapidly de-energising the dye molecules when it encounters them (i.e. a quencher). The test method using said composition is also described.
Inventors
- 👤 Ivo Giannini
- 👤 Vittorio Baroncelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/04; G; G01; G01N; G01N1/00; G01N1/28; G01N1/30; G01N33/00; G01N33/48; G01N33/50; G01N33/52; C12Q2304/00; C12Q2304/10; G01N2333/00; G01N2333/37; G01N2333/39; G01N2333/395
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A composition suitable for testing for constituents of biological tissues and/or liquids consisting of a mixture of: (a) a dye at a concentration of between 10 -5 and 10 -4 M and chosen from the xanthene, axine, oxazine or acridine series, or from water-soluble dyes of the "diazo" series, or triphenylmethane, (b) a medium compatible with the biological tissue and/or liquid, and (c) a quencher substance which may be potassium iodide, sodium iodide or the salt of a paramagnetic transition metal and capable of de-energizing the dye molecules when it encounters them said quencher substance present in said mixture at a concentration of from 10 -2 to 0.2 M.
Claim 2
Dependent Claim
109 words
A composition suitable for testing for constituents of biological tissues and/or liquids consisting of a mixture of: (a) a dye at a concentration of between 10 -5 and 10 -4 M and chosen from the xanthene, axine, oxazine or acridine series, or from water-soluble dyes of the "diazo" series, or triphenylmethane, (b) a medium compatible with the biological tissue and/or liquid, and (c) a quencher substance which may be potassium iodide, sodium iodide or the salt of a paramagnetic transition metal and capable of de-energizing the dye molecules when it encounters them said quencher substance present in said mixture at a concentration of from 10 -2 to 0.2 M.
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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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |