US3558516A
Expired / Lapsed
US
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Cholesterol determination reagent of ferric perchlorate,sulfuric acid and ethyl acetate
Assignee: Dow Chemical Co
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Filing: 1968-05-08
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Granted: 1971-01-26
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Expires: 1988-05-08
Abstract
Abstract A STABLE REAGENT FOR THE DETERMINATION OF CHOLESTERED IN BIOLOGICAL FLUIDS IS PREPARED BY DISSOLVING FERRIC PERCHLORATE IN A MIXTURE OF AN ESTER SOLVENT, PREFERABLY ETHYL ACETATE, AND SULFURIC ACID. THE REAGENT HAS IMPROVED STABILITY AND SPECIFICITY PROPERTIES. METHODS OF PREPARING THE REAGENT AND USING IT IN THE DETERMINATION OF CHOLESTEROL ARE DISCLOSED.
Inventors
- 👤 Donald R Wybenga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:42
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |