US3842159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal catalysts and method
Assignee: Ethyl Corp
•
Filing: 1972-06-21
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Granted: 1974-10-15
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Expires: 1992-06-21
Abstract
Abstract 1. A METHOD FOR REDUCING THE AMOUNT OF NITROGEN OXIDES, HYDROCARBONS AND CARBON MONOXIDE IN INTERNAL COMBUSTION ENGINE EXHAUST GAS, SAID METHOD BEING EXPECIALLY ADAPTED FOR USE WITH AN ENGINE OPERATING AT AN AIR/FUEL RATION ABOVE STOICHIOMETRIC, SAID METHOD COMPRISING CONTACTING AT ENGINE EXHAUST TEMPERATURES SAID EXHAUST GAS PRODUCED BY OPERATING SAID ENGINE AT AN AIRFUEL RATIO UP TO ABOUT 15.5 WITH MASSIVE NICKEL HAVING A SURFACE DEPOSIT THEREON OF A CATALYTIC PROMOTER QUANTITY OF A NOBLE METAL AND AM ALKALI METAL COMPOUND.
Inventors
- 👤 L Niebylski
- 👤 P Immethun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:23
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8946; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD FOR REDUCING THE AMOUNT OF NITROGEN OXIDES, HYDROCARBONS AND CARBON MONOXIDE IN INTERNAL COMBUSTION ENGINE EXHAUST GAS, SAID METHOD BEING EXPECIALLY ADAPTED FOR USE WITH AN ENGINE OPERATING AT AN AIR/FUEL RATION ABOVE STOICHIOMETRIC, SAID METHOD COMPRISING CONTACTING AT ENGINE EXHAUST TEMPERATURES SAID EXHAUST GAS PRODUCED BY OPERATING SAID ENGINE AT AN AIRFUEL RATIO UP TO ABOUT 15.5 WITH MASSIVE NICKEL HAVING A SURFACE DEPOSIT THEREON OF A CATALYTIC PROMOTER QUANTITY OF A NOBLE METAL AND AM ALKALI METAL COMPOUND.
Claim 2
Independent Claim
82 words
A METHOD FOR REDUCING THE AMOUNT OF NITROGEN OXIDES, HYDROCARBONS AND CARBON MONOXIDE IN INTERNAL COMBUSTION ENGINE EXHAUST GAS, SAID METHOD BEING EXPECIALLY ADAPTED FOR USE WITH AN ENGINE OPERATING AT AN AIR/FUEL RATION ABOVE STOICHIOMETRIC, SAID METHOD COMPRISING CONTACTING AT ENGINE EXHAUST TEMPERATURES SAID EXHAUST GAS PRODUCED BY OPERATING SAID ENGINE AT AN AIRFUEL RATIO UP TO ABOUT 15.5 WITH MASSIVE NICKEL HAVING A SURFACE DEPOSIT THEREON OF A CATALYTIC PROMOTER QUANTITY OF A NOBLE METAL AND AM ALKALI METAL COMPOUND.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |