US3718433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of analyzing of ammonia,urea,and tyrosine
Assignee: Individual
•
Filing: 1971-07-26
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Granted: 1973-02-27
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Expires: 1991-07-26
Abstract
Abstract A NEW SYSTEM OF CHEMICAL REACTIONS FOR THE ANALYSIS FOR AMMONIA, UREA AND TYROSINE AND ALSO BIURET AND ALLANTOIN IN CERTAIN SOLUTIONS. THE REACTIONS CONSIST OF A CHLORINATION OF THE NITROGEN COMPOUND IN DILUTE HYPOCHLORITE (OCL-) SOLUTION FOLLOWED BY THE CONDENSATION WITH PHENOL TO FORM UNIQUELY ABSORBING COMPOUNDS; 630 MU FOR AMMONIA, 454 MU FOR UREA AND 375 MU FOR TYROSINE. THIS METHOD PROVIDES SEVERAL PROCEDURAL ADVANTAGES ESPECIALLY SUITED FOR CLINICAL USE.
Inventors
- 👤 R Emmet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:06
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/62; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/171538; Y10T436/173845; Y10T436/175383
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |