Patent US2937490A successfully refreshed from Google Patents.
US2937490A
Expired / Lapsed
US
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Catalytic purification of exhaust gases
Assignee: Oxy Catalyst Inc
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Filing: 1957-08-12
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Granted: 1960-05-24
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Expires: 1977-08-12
Abstract
No abstract record available.
Inventors
- 👤 Willard R Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/18; F01N3/20; F01N3/2006; F01N3/204; F01N3/34; F01N3/38; F01N13/00; F01N13/14; F01N2330/00; F01N2330/08; F01N2470/00; F01N2470/30; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR AFFECTING RAPID ACTIVATION OF A CATALYTIC EXHAUST PURIFIER CONNECTED TO THE EXHAUST OUTLET FROM A SPARK-FIRED INTERNAL CONBUSTION ENGINE COMPRISING THE STEPS OF CAUSING THE ENGINE TO OPERATE INTERMITTENTLY BY INTERMITTENTLY INTERRUPTING THE NORMAL IGNITION TO THE ENGINE SPARK PLUGS, PASSING THE RAW UNOXIDIZED FUEL-AIR MIXTURE THEREBY EXHAUSTED FROM THE ENGINE CYLINDERS TO A CHAMBER ADJACENT TO AND UPSTREAM FROM A CATALYST BED, IGNITION AND BURNING SAID RAW FUEL-AIR MIXTURE IN SAID CHAMBER, THE RESULTING HOT COMBUSTION PRODUCTS BEING PUMPED BY THE ACTION OF SAID ENGINE THROUGH SAID CATALYST BED CAUSING RAPID HEATING THEREOF, AND DISCONTINUING SAID PROCEDURE WHEN AT LEAST THE INLET PORTION OF SAID CATALYST
Claim 2
Independent Claim
110 words
A METHOD FOR AFFECTING RAPID ACTIVATION OF A CATALYTIC EXHAUST PURIFIER CONNECTED TO THE EXHAUST OUTLET FROM A SPARK-FIRED INTERNAL CONBUSTION ENGINE COMPRISING THE STEPS OF CAUSING THE ENGINE TO OPERATE INTERMITTENTLY BY INTERMITTENTLY INTERRUPTING THE NORMAL IGNITION TO THE ENGINE SPARK PLUGS, PASSING THE RAW UNOXIDIZED FUEL-AIR MIXTURE THEREBY EXHAUSTED FROM THE ENGINE CYLINDERS TO A CHAMBER ADJACENT TO AND UPSTREAM FROM A CATALYST BED, IGNITION AND BURNING SAID RAW FUEL-AIR MIXTURE IN SAID CHAMBER, THE RESULTING HOT COMBUSTION PRODUCTS BEING PUMPED BY THE ACTION OF SAID ENGINE THROUGH SAID CATALYST BED CAUSING RAPID HEATING THEREOF, AND DISCONTINUING SAID PROCEDURE WHEN AT LEAST THE INLET PORTION OF SAID CATALYST
References Cited (Backward Citations)
US2658742A
Cited
US2807930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |