US3565583A
Expired / Lapsed
US
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Method and apparatus for determination of nitrogen in water and in oxygenated hydrocarbon matrices
Assignee: Dohrmann Instruments Co
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Filing: 1968-01-15
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Granted: 1971-02-23
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Expires: 1988-01-15
Abstract
Abstract METHOD AND APPARTUS FOR THE DETERMINATION OF NITROGEN IN WATER AND IN OXYGENATED HYDROCARBON MATRICES IN WHICH THE SAMPLE IS VOLATILIZED AND THEREAFTER PYROLYZED BY THE USE OF A CATALYST. AFTER PYROLYSIS, ACIDIC TYPE GASES INCLUDING CO2 ARE REMOVED AND THEREAFTER AN ELECTROCHEMICAL DETERMINATION IS MADE TO DETERMINE WHETHER A NITROGEN COMPOUND IS PRESENT IN THE RESIDUAL GAS. IN THE APPARTUS, A SPECIFIC TYPE OF SCRUBBER IS UTILIZED FOR REMOVING THE ACIDIC GASES INCLUDING CO2 FROM THE PRODUCTS OF PYROLYSIS.
Inventors
- 👤 James A Mcnulty
- 👤 Robert T Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/44; G01N31/00; G01N31/002; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/176152
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |