US3565574A
Expired / Lapsed
US
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Catalytic conversion of exhaust gas impurities
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-04-23
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Granted: 1971-02-23
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Expires: 1988-04-23
Abstract
Abstract EXHAUST GASES ARE CONTACTED WITH VARIOUS UNSUPPORTED METALS AND ALLOYS THEREOF AT ELEVATED TEMPERATURES TO CATALYTICALLY CONVERT UNBURNED HYDROCARBONS, CARBON MONOXIDE AND NITROGEN OXIDES CONTAINED THEREIN. THE CATALYSTS MAINTAIN HIGH ACTIVITY AND DURABILITY FOR LONG PEROIDS OF TIME WHEN USED AT TEMPERATURES IN EXCESS OF 800*F. EXEMPLARY CATALYSTS ARE THE METALS OF GROUPS I-B AND IV TO VIII OF THE PERIODIC SYSTEM AND VARIOUS ALLOYS THEREOF SUCH AS THE NICKEL-, IRON, AND COPPERCONTAINING ALLOYS, E.G., INCONEL, STAINLES STEEL, MONEL, ETC.
Inventors
- 👤 Kenneth K Kearby
- 👤 Harold N Miller
- 👤 Anantha K S Raman
- 👤 Joseph Vardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:47
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01D2251/00; B01D2251/10; B01D2251/102; B01D2255/00; B01D2255/20; B01D2255/207; B01D2255/20753; B01D2255/20761; B01D2258/00; B01D2258/01; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |