Patent US3557018A successfully refreshed from Google Patents.
US3557018A
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Creatinine analysis
Assignee: Merck KGaA
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Filing: 1968-07-17
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Granted: 1971-01-19
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Expires: 1988-07-17
Abstract
Abstract FOR REPRODUCIBLE QUANTITATIVE DETERMINATIONS OF CREATININE IN AN OPTIONALLY DEPROTEINIZED BIOLOGICAL FLUID, AN AQUEOUS PICRIC ACID/LITHIUM HYDROXIDE SOLUTION IS SEPARATELY ADMIXED WITH EQUAL VOLUMES OF EACH OF (A) THE OPTIONALLY DEPROTEINIZED BIOLOGICAL FLUID, (B) A STANDARD SOLUTION HAVING A KNOWN CREATININE CONTENT AND (C) A BLANK. THE LIGHT ABSORPTION (EXTINCTION OR TRANSMISSION) IS THEN MEASURED FOR EACH OF THE RESULTING ADMIXTURES. THE CREATININE CONTENT OF SAID OPTIONALLY DEPROTEINIZED BIOLOGICAL FLUID IS READILY CALCULATED FROM THE OBTAINED DATA.
Inventors
- 👤 Gunter Scheuerbrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:01
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/70; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/145555; Y10T436/147777
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |