Patent US4673556A successfully refreshed from Google Patents.
US4673556A
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US
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Method of simultaneous oxidation of carbon monoxide and unburned fuel in methanol vehicle exhaust
Assignee: Motors Liquidation Co
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Filing: 1985-11-08
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Granted: 1987-06-16
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Expires: 2005-11-08
Abstract
Abstract A method of treating exhaust gases from an internal combustion engine burning methanol fuel by simultaneously oxidizing the unburned methanol and carbon monoxide at low conversion temperatures by passing the exhaust gases over a catalyst system consisting essentially of silver and palladium dispersed on gamma alumina.
Inventors
- 👤 Robert W. McCabe
- 👤 Patricia J. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:52
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8668; B01D53/92; B01D53/94; B01D53/944; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A method of treating exhaust gases from an internal combustion engine burning methanol fuel by simultaneously oxidizing the unburned methanol and carbon monoxide contained in said exhaust gases, said method comprising the step of passing said exhaust gases over a catalyst system consisting essentially of 5 weight percent silver and 0.01 weight percent palladium dispersed on a substrate, whereby said palladium is finely dispersed in and in initimate contact with said silver to simultaneously oxidize unburned methanol and carbon monoxide into carbon dioxide and water.
Claim 2
Independent Claim
85 words
A method of treating exhaust gases from an internal combustion engine burning methanol fuel by simultaneously oxidizing the unburned methanol and carbon monoxide contained in said exhaust gases, said method comprising the step of passing said exhaust gases over a catalyst system consisting essentially of 5 weight percent silver and 0.01 weight percent palladium dispersed on a substrate, whereby said palladium is finely dispersed in and in initimate contact with said silver to simultaneously oxidize unburned methanol and carbon monoxide into carbon dioxide and water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |