US4343074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a catalytic converter
Assignee: Honeywell UOP LLC
•
Filing: 1980-11-10
•
Granted: 1982-08-10
•
Expires: 2000-11-10
Abstract
Abstract Arrangement for resiliently mounting a ceramic monolithic type catalytic converter element in a metal housing with a blanket of knit wire mesh material includes at least one circumferential band of high temperature intumescent material containing ceramic fibers positioned within the wire mesh blanket which prevents virtually all bypass leakage around the element and substantially reduces the temperature of the wire mesh.
Inventors
- 👤 Charles H. Bailey
- 👤 Ted V. De Palma
- 👤 James E. Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:50
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2853; F01N3/2857; B; B23; B23P; B23P15/00; B23P2700/00; B23P2700/03; F01N2350/00; F01N2350/02; F01N2350/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345; Y10T29/49826; Y10T29/49879; Y10T29/49885; Y10T29/49893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
In a method of making a catalytic converter of the type wherein a monolithic catalyst element is mounted in a metal housing and is resiliently engaged by a compressed blanket of metal wire mesh, the improvement comprising the step of injecting a continuous circumferential band of viscous fiber reinforced high temperature intumescent caulking material which is of substantially less axial length than the axial length of said catalyst element into the interstices of the mesh and throughout its thickness before the mesh and monolithic element are assembled into the housing, said caulking material being expanded by the hot exhaust gases to which the converter is subjected during use, said band of caulking material serving to reduce bypass gas leakage through the metal wire mesh and also reducing the temperature of the metal mesh.
Claim 2
Dependent Claim
133 words
In a method of making a catalytic converter of the type wherein a monolithic catalyst element is mounted in a metal housing and is resiliently engaged by a compressed blanket of metal wire mesh, the improvement comprising the step of injecting a continuous circumferential band of viscous fiber reinforced high temperature intumescent caulking material which is of substantially less axial length than the axial length of said catalyst element into the interstices of the mesh and throughout its thickness before the mesh and monolithic element are assembled into the housing, said caulking material being expanded by the hot exhaust gases to which the converter is subjected during use, said band of caulking material serving to reduce bypass gas leakage through the metal wire mesh and also reducing the temperature of the metal mesh.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said caulking material is injected substantially throughout the entire thickness of said mesh blanket.
Claim 4
Dependent Claim
29 words
The method of claim 2 wherein said caulking material is applied so that its axial extent is less than 10 percent of the length of the monolithic catalyst element.
References Cited (Backward Citations)
US3511906A
Cited
US3975826A
Cited
US3876384A
Cited
US4143117A
Cited
US4163042A
Cited
US4004887A
Cited
US3916057A
Cited
US3990859A
Cited
US3966419A
Cited
US3966419B1
Cited
US3966419B2
Cited
DE2515732A1
Cited
US4101280A
Cited
US4142864A
Cited
US4239733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |