Patent US4384891A successfully refreshed from Google Patents.
US4384891A
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Metal alloy with high catalytic activity
Assignee: Renault SA
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Filing: 1980-07-07
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Granted: 1983-05-24
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Expires: 2000-07-07
Abstract
Abstract A metal alloy having high catalytic activity comprising a refractory base metal mass containing carbon and at least one metal of the platinum type, the surface of which has been subjected to intergranular acid corrosion which produces microfissures and causes the formation of microcrystals of the platinum metals. The catalyst is useful in exhaust catalystic converters.
Inventors
- 👤 Jean-Louis Barnabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:56
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; C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A metal alloy consisting essentially of: ______________________________________
iron 40-80% by weight
nickel 0-40% by weight
chromium 0-40% by weight
carbon 0.02-0.1% by weight
at least one
platinum group
metal 0.05-2% by weight.
______________________________________
Claim 2
Dependent Claim
33 words
A metal alloy consisting essentially of: ______________________________________
iron 40-80% by weight
nickel 0-40% by weight
chromium 0-40% by weight
carbon 0.02-0.1% by weight
at least one
platinum group
metal 0.05-2% by weight.
______________________________________
Claim 3
Dependent Claim
40 words
The metal alloy of claim 1 additionally comprising 0-3% by weight of at least one element selected from the group consisting of Ce, Cu, Mo, Ti, La, Ca, Y, Al, W and Mn to serve as an activator or stabilizer.
Claim 4
Dependent Claim
38 words
The metal alloy of claim 1 or 2 wherein said platinum group metal is selected from the group consisting of: ______________________________________
platinum 0.05-0.2% by weight
ruthenium 0.1-0.2% by weight
rhodium 0.05-0.1% by weight
palladium 0.05-0.2% by weight.
______________________________________
References Cited (Backward Citations)
US4061495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |