Patent US4196099A successfully refreshed from Google Patents.
US4196099A
Expired / Lapsed
US
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Catalyst comprising a metal substrate
Assignee: Johnson Matthey Inc
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Filing: 1978-02-10
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Granted: 1980-04-01
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Expires: 1998-02-10
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
- 👤 Alfred F. D'Alessandro
- 👤 Larry L. Lawlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:56
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; C07C1/044; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J; B01J23/00; B01J23/38; B01J23/40; B01J37/00; B01J37/02; B01J37/024; 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: 5
Claim 1
Independent Claim
120 words
A supported catalyst 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 at a temperature between about 250° F. and 500° F. and which consists essentially of a dispersion of aluminum metal powder in an aqueous chromate salt solution and a ceramic aluminum phosphate binder and amine modifier; 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
120 words
A supported catalyst 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 at a temperature between about 250° F. and 500° F. and which consists essentially of a dispersion of aluminum metal powder in an aqueous chromate salt solution and a ceramic aluminum phosphate binder and amine modifier; 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
18 words
A catalyst according to claim 1 wherein the substrate is a stainless steel and the washcoat is alumina.
Claim 4
Dependent Claim
12 words
A catalyst according to claim 1 in the form of a honeycomb.
Claim 5
Dependent Claim
13 words
A catalyst according to claim 2 wherein the substrate is stainless steel 420.
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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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |