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US5053378A
Expired / Lapsed
US
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Multi-purpose catalysts for vehicular catalytic converters
Assignee: Pro Catalyse SA
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Filing: 1989-08-28
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Granted: 1991-10-01
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Expires: 2009-08-28
Abstract
Abstract Multiple purpose catalysts adapted for the treatment of internal combustion engine exhaust gases comprise a particulate refractory oxide support, e.g., alumina particles, having an active catalytic phase deposited thereon, said active catalytic phase including zirconium, cerium and platinum, and optionally iridium, rhodium, palladium and other metal values.
Inventors
- 👤 Gilbert Blanchard
- 👤 Jack Caillod
- 👤 Richard Doziere
- 👤 Michel Prigent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:53
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/63; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum; and at least one of the metals tungsten, nickel, manganese, tin and rhenium, wherein the total amount thereof ranges from 0.2% to 5% by weight, based on the weight of the support, said particulate refractory support having a specific surface area of from 70 to 350 m.sup. 2/g.
Claim 2
Dependent Claim
93 words
A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum; and at least one of the metals tungsten, nickel, manganese, tin and rhenium, wherein the total amount thereof ranges from 0.2% to 5% by weight, based on the weight of the support, said particulate refractory support having a specific surface area of from 70 to 350 m.sup. 2/g.
Claim 3
Dependent Claim
103 words
A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum; at least one of the elements iridium, palladium and rhodium; and at least one of the metals tungsten, nickel, manganese, tin and rhenium, wherein the total amount thereof ranges from 0.2% to 5% by weight based on the weight of the support, said particulate refractory support having a specific surface area of from 70 to 350 m.sup. 2/g.
Claim 4
Dependent Claim
103 words
A multi-purpose catalyst composition adapted for the treatment of internal combustion engine exhaust gases, which comprises a particulate refractory oxide active support having an active catalytic phase deposited thereon, said active catalytic phase consisting essentially of a catalytically effective amount of zirconium, cerium and platinum; at least one of the elements iridium, palladium and rhodium; and at least one of the metals tungsten, nickel, manganese, tin and rhenium, wherein the total amount thereof ranges from 0.2% to 5% by weight based on the weight of the support, said particulate refractory support having a specific surface area of from 70 to 350 m.sup. 2/g.
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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |