US2957076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-air ratio determination by infrared analysis of exhaust gases
Assignee: Texaco Inc
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Filing: 1957-08-29
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Granted: 1960-10-18
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Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 Stanley A Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:48
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
157 words
IN THE DETERMINATION OF A FUEL-AIR RATION BY ANALYSIS OF AN EXHAUST GAS, THE STEPS COMPRISING PASSING INFRA-RED RADIATION THROUGH A SAMPLE OF EXHAUST GAS CONTAINING UNKNOWN QUANTITIES OF CO, CO2 AND UNBURNT HYDROCARBONS, DETECTING THE EFFECT OF SAID RADIATION WITH REPECT TO THE ABSORPTION OF SAID RADIATION PECULIAR TO THE PRESENCE OF CO AND CO2 IN SAID SAMPLE, PASSING A SAMPLE FROM THE SAME PORTION OF SAID EXHAUST GAS THROUGH A CATALYTIC CONVERSION CHAMBER IN THE PRESENCE OF A PLATINUM CATALYST AND UNDER CONDITIONS TO CAUSE SAID UNBURNT HYDROCARBONS TO REACT WITH CO2 IN EXCESS IN SAID SAMPLE TO FORM CO AND H2, PASSING INFRA-RED RADIATION THROUGH SAID SAMPLE OF CONVERTED EXHAUST GAS, AND DETECTING THE ABSORPTION EFFECT ON SAID RADIATION PECULIAR TO THE MODIFIED CONTENT OF CO AND CO2, FROM WHICH THE ACTUAL CONTENT OF UNBURNT HYDROCARBONS IN SAID EXHAUST GAS CAN BE DETERMINED AND THE FUEL-AIR RATIO THEREOF DETERMINED FROM A FUEL-AIR RATIO CHART.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |