Patent US5396890A successfully refreshed from Google Patents.
US3291564A
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Method of treating exhaust gases of internal combustion engines utilizing a stabilized alumina catalyst support
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-08-31
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Granted: 1966-12-13
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Expires: 1982-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth K Kearby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5191
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR OXIDIZING CARBON MONOXIDE AND HYDROCARBONS CONTAINED IN INTERNAL COMBUSTION ENGINE EXHAUST GASES BY PASSING SAID GASES AT ELEVATED TEMPERATURES IN THE PRESENCE OF OXYGEN INTO CONTACT WITH A METAL OXIDATION CATALYST DEPOSITED ON AN ACTIVATED ALUMINA SUPPORT, THE IMPROVMENT WHICH COMPRISES USING AS SAID SUPPORT, AN ALUMINA STABILIZED BY ABOUT 2.5 TO 5 MOLE PERCENT OF ADMIXED BARIUM CHLORIDE BASED ON THE ALUMINA WHEN THE ALUMINA IS ACTIVATED BY CALCINATION TO THE ETA PHASE EFFECTIVE FOR PREVENTING CONVERSION OF THE ETA PHASE ALUMINA TO THETA PHASE ALUMINA AT ELEVATED TEMPERATURES RANGING UP TO 1600*F.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR OXIDIZING CARBON MONOXIDE AND HYDROCARBONS CONTAINED IN INTERNAL COMBUSTION ENGINE EXHAUST GASES BY PASSING SAID GASES AT ELEVATED TEMPERATURES IN THE PRESENCE OF OXYGEN INTO CONTACT WITH A METAL OXIDATION CATALYST DEPOSITED ON AN ACTIVATED ALUMINA SUPPORT, THE IMPROVMENT WHICH COMPRISES USING AS SAID SUPPORT, AN ALUMINA STABILIZED BY ABOUT 2.5 TO 5 MOLE PERCENT OF ADMIXED BARIUM CHLORIDE BASED ON THE ALUMINA WHEN THE ALUMINA IS ACTIVATED BY CALCINATION TO THE ETA PHASE EFFECTIVE FOR PREVENTING CONVERSION OF THE ETA PHASE ALUMINA TO THETA PHASE ALUMINA AT ELEVATED TEMPERATURES RANGING UP TO 1600*F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |