US4857413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-made carrier body for exhaust gas cleaning catalyst
Assignee: Usui Kokusai Sangyo Kaisha Ltd
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Filing: 1988-12-23
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Granted: 1989-08-15
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Expires: 2008-12-23
Abstract
Abstract A metal-made carrier body is provided for an exhaust gas cleaning catalyst. The carrier body includes a cylindrical metal casing and a metal-made multi-layered composite body. The composite body has been obtained by superposing one over the ther at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and then rolling both the bands together into a spiral form, so that the composite body defines many network-patterned gas flow passages along the central axis thereof. The composite body is enclosed within the metal casing. A gas-permeable insert is centrally and axially embedded within the multi-layered composite body of the planar metal band and the corrugated metal band.
Inventors
- 👤 Yasuaki Hashimoto
- 👤 Haruo Serizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2330/00; F01N2330/02; F01N2330/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/1234; Y10T428/1241
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
In a metal-made carrier body for an exhaust gas cleaning catalyst, including a cylindrical metal casing and a metal-made multi-layered composite body obtained by superposing one over the other at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and then rolling both the bands together into a spiral form, defining many network-patterned gas flow passages along the central axis thereof and enclosed within the metal casing, the improvement wherein a gas-permeable insert is centrally and axially embedded within the multi-layered composite body of the planar metal band and the corrugated metal band.
Claim 2
Dependent Claim
108 words
In a metal-made carrier body for an exhaust gas cleaning catalyst, including a cylindrical metal casing and a metal-made multi-layered composite body obtained by superposing one over the other at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and then rolling both the bands together into a spiral form, defining many network-patterned gas flow passages along the central axis thereof and enclosed within the metal casing, the improvement wherein a gas-permeable insert is centrally and axially embedded within the multi-layered composite body of the planar metal band and the corrugated metal band.
Claim 3
Dependent Claim
25 words
The metal-made carrier body as claimed in claim 1, wherein the embedded gas-permeable insert is a stainless mesh formed in the shape of a rod.
Claim 4
Dependent Claim
24 words
The metal-made carrier body as claimed in claim 1, wherein the embedded gas-permeable insert is stainless wool formed in the shape of a rod.
Claim 5
Dependent Claim
33 words
The metal-made carrier body as claimed in claim 1, wherein the embedded gas-permeable insert is a corrugated band of a thin metal sheet, which has been formed into the shape of a cylinder.
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |