US3554701A
Expired / Lapsed
US
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Uric acid test procedure
Assignee: Roche Diagnostics Corp
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Filing: 1969-01-23
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Granted: 1971-01-12
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Expires: 1989-01-23
Abstract
Abstract TEST PROCEDURE WHICH IS USEFUL IN THE DETERMINATION OF URIC ACID IN BODY FLUIDS. THE TEST REAGENT COMPRISES A SOLUTION OF 2,4-DIMETHYLQUINOLINE IN ETHYL ALCOHOL IN THE PRESENCE OF SULFURIC ACID. TEST REAGENT TURNS BROWN IN THE PRESENCE OF URIC ACID AND CAN BE USED FOR THE QUALITATIVE AND QUANTITATIVE DETERMINATION OF URIC ACID.
Inventors
- 👤 William N Cottrell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:15
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/103332; Y10T436/14; Y10T436/145555; Y10T436/147777; Y10T436/148888
Claims Analysis
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |