Patent US3806428A successfully refreshed from Google Patents.
US3806428A
Expired / Lapsed
US
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Potentiometric nitric oxide analysis
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-09-01
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Granted: 1974-04-23
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Expires: 1992-09-01
Abstract
Abstract AN ANALYZER FOR THE MEASUREMENT OF NITRIC OXIDE, PARTICULARLY WHEN IN COMBINATIN WITH AUTOMOTIVE EXHAUST GASES, MEASURES NITRIC OXIDE CONCENTRATION AS A FUNCTION OF THE VOLTAGE MEASURED BY A POTENTIOMETRIC CELL COMPRISING FERROUS AND FERRIC SALTS DISSOLVED IN A SUITABLE SOLVENT. NITRIC OXIDE COMPLEXES FERROUS IONS, THUS CREATING AN ELECTROCHEMICAL VOLTAGE RELATIVE TO A CELL WHICH HAS NOT BEEN EXPOSED TO THE LOGARITHM OF THE NITRIC OXIDE CONIS PROPORTIONAL TO THE LOGARITHM OF THE NITRIC OXIDE CONCENTRATION. THE ANALYZER IS USABLE WITH GASES CONTAINING LESS THAN 100 PARTS PER MILLION AND UP TO PURE NO AND IS NOT AFFECTED BY THE PRESENCE OF OTHER GASES.
Inventors
- 👤 M Beltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4162
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) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |