Patent US3297400A successfully refreshed from Google Patents.
US3297400A
Expired / Lapsed
US
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Catalytic purification of exhaust gases
Assignee: Mobil Oil AS
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Filing: 1962-09-11
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Granted: 1967-01-10
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Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 Sylvander C Eastwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:55
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2053; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; F01N13/00; F01N13/009; F01N2330/00; F01N2330/08; F01N2390/00; F01N2390/04; F01N2410/00; F01N2410/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD FOR CONTROLLING CATALYST BED TEMPERATURES IN THE OXIDATION OF EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE WHICH COMPRISES FLOWING A GASEOUS MIXTURE OF SAID EXHAUST GASES AND AIR INTO A CATALYTIC CONVERTER COMBINING AT LEAST A PAIR OF SERIALLY ARRANGED OXIDATION CATALYST BEDS AND THROUGH THE INITIAL AND ULTIMATE CATALYST BEDS UNTIL A TEMPERATURE OF THE ULTIMATE CATALYST BED OF ABOUT 900*F. IS ATTAINED; SENSING THE TEMPERATURE WITHIN THE ULTIMATE CATALYST BED; DIVERTING THE FLOW OF SAID GASEOUS MIXTURE WHEN THE TEMPERATURE OF THE ULTIMATE BED RANGES FROM ABOUT 900*F. TO ABOUT 1600*F., TO BY-PASS THE INITIAL CATALYST BED AND FLOW THROUGH THE ULTIMATE CATALYST BED; AND BYPASSING THE FLOW OF SAID GASEOUS MIXTURE THROUGH THE CATALYTIC CONVERTER WITHOUT PASSING THROUGH ANY OF THE CATALYST BEDS WHEN THE ULTIMATE CATALYST BED TEMPERATURE EXCEEDS ABOUT 1600*F.
Claim 2
Independent Claim
137 words
A METHOD FOR CONTROLLING CATALYST BED TEMPERATURES IN THE OXIDATION OF EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE WHICH COMPRISES FLOWING A GASEOUS MIXTURE OF SAID EXHAUST GASES AND AIR INTO A CATALYTIC CONVERTER COMBINING AT LEAST A PAIR OF SERIALLY ARRANGED OXIDATION CATALYST BEDS AND THROUGH THE INITIAL AND ULTIMATE CATALYST BEDS UNTIL A TEMPERATURE OF THE ULTIMATE CATALYST BED OF ABOUT 900*F. IS ATTAINED; SENSING THE TEMPERATURE WITHIN THE ULTIMATE CATALYST BED; DIVERTING THE FLOW OF SAID GASEOUS MIXTURE WHEN THE TEMPERATURE OF THE ULTIMATE BED RANGES FROM ABOUT 900*F. TO ABOUT 1600*F., TO BY-PASS THE INITIAL CATALYST BED AND FLOW THROUGH THE ULTIMATE CATALYST BED; AND BYPASSING THE FLOW OF SAID GASEOUS MIXTURE THROUGH THE CATALYTIC CONVERTER WITHOUT PASSING THROUGH ANY OF THE CATALYST BEDS WHEN THE ULTIMATE CATALYST BED TEMPERATURE EXCEEDS ABOUT 1600*F.
References Cited (Backward Citations)
US3086839A
Cited
US3090677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |