Patent US4289652A successfully refreshed from Google Patents.
US4289652A
Expired / Lapsed
US
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Catalyst comprising a metal substrate
Assignee: Johnson Matthey Inc
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Filing: 1980-02-01
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Granted: 1981-09-15
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Expires: 2000-02-01
Abstract
Abstract A catalyst comprising a metal or alloy substrate, an oxidation resistant coating applied to the substrate, the coating comprising aluminum metal powder in a ceramic binder, a high surface area catalytic washcoat over the oxidation resistant coating and a catalytically active material, e.g. a platinum group metal, associated with the washcoat.
Inventors
- 👤 James B. Hunter
- 👤 George McGuire
- 👤 A. F. D'Alessandro
- 👤 Larry L. Lawlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:57
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/024; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J23/00; B01J23/38; B01J23/40; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; C07C2521/00; C07C2521/02; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/38; C07C2523/40; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/76; C07C2523/84; C07C2523/85; C07C2523/86; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A supported catalyst suitable for use at a temperature above 1200° F. consisting essentially of a metal or alloy substrate which itself is not heat or oxidation resistant at a temperature above 1200° F.; a heat-cured oxidation resistant coating applied to said substrate, said coating being applied as an aqueous coating composition which is curable into water-insoluble oxidation resistant form by heating and which consists essentially of a dispersion of aluminum metal powder in an aqueous chromium-containing/aluminum phosphate binder composition; a high surface area refractory oxide washcoat over said oxidation resistant coating and a catalytically active platinum group metal deposited on said washcoat.
Claim 2
Dependent Claim
103 words
A supported catalyst suitable for use at a temperature above 1200° F. consisting essentially of a metal or alloy substrate which itself is not heat or oxidation resistant at a temperature above 1200° F.; a heat-cured oxidation resistant coating applied to said substrate, said coating being applied as an aqueous coating composition which is curable into water-insoluble oxidation resistant form by heating and which consists essentially of a dispersion of aluminum metal powder in an aqueous chromium-containing/aluminum phosphate binder composition; a high surface area refractory oxide washcoat over said oxidation resistant coating and a catalytically active platinum group metal deposited on said washcoat.
Claim 3
Dependent Claim
13 words
A catalyst according to claim 1 wherein the substrate is a stainless steel.
Claim 4
Dependent Claim
13 words
A catalyst according to claim 2 wherein the substrate is stainless steel 420.
Claim 5
Dependent Claim
26 words
A catalyst according to claim 1 wherein the catalytically active material comprises one or more platinum group metals or combination of PGM's with other catalytic materials.
Claim 6
Dependent Claim
108 words
In a supported catalyst which is suitable for use at elevated temperatures comprising a metal or alloy substrate which itself is not heat or oxidation resistant at the temperature of use and which is used to support a catalytically active platinum group metal supported on said substrate, the improvement which comprises a heat-cured oxidation resistant coating applied to said substrate between the substrate and the platinum group metal to protect the substrate, said coating being applied as an aqueous coating composition which is curable into water-insoluble oxidation resistant form by heating and which consists essentially of a dispersion of aluminum metal powder in an aqueous chromium-containing/aluminum phosphate binder.
Claim 7
Dependent Claim
108 words
In a supported catalyst which is suitable for use at elevated temperatures comprising a metal or alloy substrate which itself is not heat or oxidation resistant at the temperature of use and which is used to support a catalytically active platinum group metal supported on said substrate, the improvement which comprises a heat-cured oxidation resistant coating applied to said substrate between the substrate and the platinum group metal to protect the substrate, said coating being applied as an aqueous coating composition which is curable into water-insoluble oxidation resistant form by heating and which consists essentially of a dispersion of aluminum metal powder in an aqueous chromium-containing/aluminum phosphate binder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |