US5028397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic converter
Assignee: 3M Co
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Filing: 1990-01-31
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Granted: 1991-07-02
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Expires: 2010-01-31
Abstract
Abstract A catalytic converter utilizing a resilient, flexible shot-free ceramic fiber containing mounting mat for mounting a monolith within a metallic casing is disclosed. The mounting mat may be comprised of shot-free ceramic fibers alone or preferably is comprised of a composite of shot-free ceramic fibers in combination with an intumescent sheet material.
Inventors
- 👤 Richard P. Merry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:10
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2853; F01N3/2864; F01N3/2857; F01N2330/00; F01N2330/02; F01N2330/06; F01N2350/00; F01N2350/02; F01N2350/04; F01N2450/00; F01N2450/02; F01N2470/00; F01N2470/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
A resilient, flexible, fibrous mat of shot-free ceramic fibers having a stitchbonded compressed thickness in the range of 4 to 25 mm and a density of about 0.25 to about 0.50 g/cm 3 .
Claim 2
Dependent Claim
34 words
A resilient, flexible, fibrous mat of shot-free ceramic fibers having a stitchbonded compressed thickness in the range of 4 to 25 mm and a density of about 0.25 to about 0.50 g/cm 3 .
Claim 3
Dependent Claim
23 words
The mat of claim 1 wherein said shot-free ceramic fiber comprises alumina-boria-silica fibers, alumina-silica fibers, alumina-phosphorus pentoxide fibers, zirconia-silica fibers or alumina fibers.
Claim 4
Dependent Claim
16 words
The mat of claim 2 wherein said shot-free ceramic fiber is derived from a sol-gel process.
References Cited (Backward Citations)
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GB1452982A
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US4279864A
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US4381590A
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US4269807A
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Cited
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GB2171180A
Cited
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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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |