Patent US3711252A successfully refreshed from Google Patents.
US3711252A
Expired / Lapsed
US
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Composition and method for the detection of uric acid
Assignee: Individual
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Filing: 1971-10-13
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Granted: 1973-01-16
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Expires: 1991-10-13
Abstract
Abstract METHOD FOR DETECTING URIC ACID IN AQUEOUS FLUIDS WHICH COMPRISES CONTACTING THE FLUID WITH A COMPOSITION COMPRISING A FERRIC SALT AND EITHER 2,4,6-TRI(2-PYRIDYL)-1,3,5-TRIAZINE OR 2,2'':6'',2"-TERPYRIDE, IN A BUFFERED ACIDIC MEDIUM. A PREFERABLE EMBODIMENT COMPRISES INCORPORATING THE COMPOSITION WITH A CARRIER AND USING THE RESULTING COMBINATION AS A DIP AND READ TEST DEVICE. A FURTHER PREFERABLE EMBODIMENT COMPRIESSES THE USE OF A PERSULFATE IN THE COMPOSITION WHICH INCREASES THE SPECIFICITY AND STABILITY OF THE COMPOSITION.
Inventors
- 👤 A Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:44
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/145555; Y10T436/147777; Y10T436/148888
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |