US2921841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determination of fuel-air ratio of gas mixtures
Assignee: Individual
•
Filing: 1956-07-16
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Granted: 1960-01-19
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Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 Harold C Gerrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; G01N27/185; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/207497; Y10T436/208339; Y10T436/21; Y10T436/218
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
THE METHOD OF DETERMING THE FUEL-AIR RATIO OF AN ENGINE EXHAUST GAS COMPRISING THE STEPS OF EXTRACTING A SAMPLE OF AMBIENT AIR, DRYING SAID SAMPLE OF AMBIENT AIR, DETERMING THE THERMAL CONDUCTIVITY OF SAID DRIED SAMPLE OF AMBIENT AIR, EXTRACTING A SAMPLE OF SAID ENGINE EXHAUST GAS, DRYING SAID SAMPLE OF ENGINE EXHAUSE GAS, MIXING SAID SAMPLE OF DRIED AMBIENT AIR AND EXHAUST GAS IN A PREDETERMINED RATIO, OXIDIZING SAID MIXED SAMPLES OF DRIED AIR AND EXHAUST GAS, WHEREBY COMPLETE OXIDATION OF ALL CARBON IN SAID MIXED SAMPLES IN OBTAINED, DRYING SAID SAMPLES OF MIXED OXIDIZED AMBIENT AIR AND EXHAUST GAS, DETERMINING THE THERMAL CONDUCTIVITY OF SAID MIXED SAMPLES OF OXIDIZED AMBIENT AIR AND EXHAUST GAS AND COMPARING THE THERMAL CONDUCTIVITIES OF SAID DRIED SAMPLE OF AMBIENT AIR AND SAID DRIED MIXED SAMPLE OF AMBIENT AIR AND EXHAUST GAS.
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |