US3712853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic agent for the detection of nitrite and of nitrite-forming bacteria
Assignee: Roche Diagnostics GmbH
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Filing: 1970-07-15
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Granted: 1973-01-23
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Expires: 1990-07-15
Abstract
Abstract NITRITIES, E.G., NITRITES FORMED BY BACTERIA IN BODY FLUIDS, ARE DETECTED EVEN IN VERY SMALL CONCENTRATIONS, WITH A DIAGNOSTIC TEST REAGENT COMPRISING A DIAZOTIZABLE AMINE. A SOLID ORGANIC ACID, AND A COUPLING COMPONENT OF THE FORMULA 1-R,R''-1,2,3,4-TETRAHYDRO-BENZO(H)QUINOLINE WHEREIN R IS HYDROGEN OR ALKYL, PREFERABLY LOWER ALKYL, AND R'' IS HYDROGEN, HYDROXYL OR ALKYL, PREFERABLY LOWER ALKYL, OR ACYLOXY, PREFERABLY LOWER ACYLOXY.
Inventors
- 👤 W Rittersdorf
- 👤 H Ray
- 👤 P Rieckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:16
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/04; C12Q1/12; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/84; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |