Patent US3994831A successfully refreshed from Google Patents.
US3994831A
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US
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Metallic catalyst support and catalytic metal coated on same
Assignee: Individual
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Filing: 1975-09-02
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Granted: 1976-11-30
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Expires: 1995-09-02
Abstract
Abstract A perforated catalyst support formed in the shape of Lessing ring is disclosed. Also disclosed is a method of converting hydrocarbon waste gas streams which utilizes a catalyst supported on the perforated Lessing ring.
Inventors
- 👤 Erwin C. Betz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:01
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/72; B01J; B01J23/00; B01J23/38; B01J23/40; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30223; B01J2219/304; B01J2219/30475; B01J35/00; B01J35/50; B01J35/55
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
15 words
A metallic catalyst support having perforations and formed in the shape of a Lessing ring.
Claim 2
Dependent Claim
15 words
A metallic catalyst support having perforations and formed in the shape of a Lessing ring.
Claim 3
Dependent Claim
15 words
The catalyst support of claim 1, wherein the support is made from perforated metal ribbon.
Claim 4
Dependent Claim
26 words
The catalyst support of claim 1, wherein the metal is an alloy of nickel, chromium and iron; aluminum, chromium and iron; or chromium, silicon and iron.
Claim 5
Dependent Claim
20 words
The catalyst support of claim 1, wherein the surfaces of the catalyst support are coated with a catalytically active metal.
Claim 6
Dependent Claim
18 words
The catalyst support of claim 4, wherein the catalytically active metal is a mixture of platinum and palladium.
Claim 7
Dependent Claim
42 words
The catalyst support of claim 1, wherein the metal is an alloy of nickel, chromium, and iron; aluminum, chromium, and iron; or chromium, silicon, and iron and the surfaces of the catalyst support are coated with a mixture of platinum and palladium.
Claim 8
Dependent Claim
37 words
The catalyst support of claim 1, wherein the cylinder and the bisecting surface are shaped as an S in which the ends of the S are extended to form the essentially closed cylinder portion of the support.
Claim 9
Dependent Claim
39 words
The catalyst support of claim 1, wherein a strip of perforated metal is formed into the essentially closed cylinder and the bisecting surface is formed by extending one end of the strip into the enclosure formed by the cylinder.
Claim 10
Dependent Claim
42 words
The catalyst support of claim 7, wherein the surfaces of the support are coated with a mixture of platinum and palladium and wherein the metal is an alloy of nickel, chromium, and iron; aluminum, chromium, and iron; or chromium, silicon, and iron.
Claim 11
Dependent Claim
38 words
The catalyst support of claim 8, wherein the metal is an alloy of nickel, chromium, and iron; aluminum, chromium, and iron; or chromium, silicon, and iron and the metal is coated with a mixture of platinum and palladium.
References Cited (Backward Citations)
US2756121A
Cited
US2974150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |