US3931049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a catalyst
Assignee: Olin Corp
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Filing: 1974-12-12
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Granted: 1976-01-06
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Expires: 1994-12-12
Abstract
Abstract A catalyst for the reduction of automobile pollution and a method for forming the same are described. The catalyst comprises a nickel alloy substrate having specified composition and a surface layer containing from 10 to 50% copper. The copper concentration varies from 10 to 50% at the surface to 0% within the substrate.
Inventors
- 👤 James A. Ford
- 👤 Sheldon H. Butt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:56
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; C22C19/007; B01D2255/00; B01D2255/20; B01D2255/204; B01D2255/2047; B01D2255/207; B01D2255/2073; B01D2255/20753; B01D2255/20761; B01D2255/90; B01D2255/902; B01D2255/9025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A method for producing a catalyst comprising the steps of: A. providing a nickel alloy substrate, said alloy containing from 2 to 6% aluminum, from 0.5 to 4% silicon and the balance essentially nickel; B. applying to said substrate a layer of a surface material of copper or a copper alloy by electroplating, said layer having a thickness of from 1,000 A to 0.1 inch; and C. heat treating the substrate-surface layer combination at a temperature of from 750° to 1050°C for from 5 minutes to 4 hours in an atmosphere nonoxidizing to nickel, whereby the surface layer and the substrate interdiffuse so that the ratio of nickel to copper at the
Claim 2
Independent Claim
112 words
A method for producing a catalyst comprising the steps of: A. providing a nickel alloy substrate, said alloy containing from 2 to 6% aluminum, from 0.5 to 4% silicon and the balance essentially nickel; B. applying to said substrate a layer of a surface material of copper or a copper alloy by electroplating, said layer having a thickness of from 1,000 A to 0.1 inch; and C. heat treating the substrate-surface layer combination at a temperature of from 750° to 1050°C for from 5 minutes to 4 hours in an atmosphere nonoxidizing to nickel, whereby the surface layer and the substrate interdiffuse so that the ratio of nickel to copper at the
Claim 3
Dependent Claim
13 words
A method as in claim 1 wherein the copper concentration at the surface
Claim 4
Dependent Claim
27 words
A method as in claim 1 wherein said nickel alloy substrate contains from .001 to .4% manganese and from .001 to .1% magnesium in addition to the
Claim 5
Dependent Claim
13 words
A method as in claim 1 wherein the nickel alloy substrate contains from
Claim 6
Dependent Claim
13 words
A method as in claim 1 wherein the nickel alloy substrate contains from
Claim 7
Dependent Claim
13 words
A method as in claim 1 wherein the nickel alloy substrate contains from
Claim 8
Dependent Claim
34 words
A method as in claim 1 including the steps of heating the heat treated substrate-surface layer combination in an oxidizing atmosphere at a temperature of between 200° and 600°C for a time period of
Claim 9
Dependent Claim
14 words
A method as in claim 1 including the step of forming the substrate into
Claim 10
Dependent Claim
26 words
A method as in claim 1 wherein the copper layer is formed by electroplating alternate layers of copper and nickel until the desired thickness is obtained.
References Cited (Backward Citations)
US3718733A
Cited
US3773894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |