US5480622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heatable catalyst device using electrically conductive non-metallic materials
Assignee: Ford Global Technologies LLC
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Filing: 1994-07-05
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Granted: 1996-01-02
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Expires: 2014-07-05
Abstract
Abstract This invention is directed to an electrically heatable catalyst device comprising an electrically insulating substrate carrying an electrically conductive material selected from metal oxides, carbides, nitrides and silicides, and applied thereon a washcoat carrying a catalyst.
Inventors
- 👤 Chaitanya K. Narula
- 👤 Jacobus H. Visser
- 👤 Andrew A. Adamczyk, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:26
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J35/00; B01J35/30; B01J35/33; B01J37/00; B01J37/02; B01J37/024; B01J37/0244; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2835; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
An electrically heatable catalyst device comprising; an electrically insulating substrate; a layer of an electrically conductive material selected from the group consisting of flourine-doped tin oxide and tin oxide-doped indium oxide applied over a surface of the substrate; a washcoat carried on a surface of the electrically conductive material layer; and a catalyst carried on a surface of the washcoat.
Claim 2
Dependent Claim
60 words
An electrically heatable catalyst device comprising; an electrically insulating substrate; a layer of an electrically conductive material selected from the group consisting of flourine-doped tin oxide and tin oxide-doped indium oxide applied over a surface of the substrate; a washcoat carried on a surface of the electrically conductive material layer; and a catalyst carried on a surface of the washcoat.
Claim 3
Dependent Claim
21 words
The catalyst device according to claim 1, wherein said electrically conductive material layer is less than about 5000 Angstroms in thickness.
Claim 4
Dependent Claim
41 words
The catalyst device according to claim 1, wherein said washcoat is selected from the group consisting of (a) alumina, (b) titanium oxide, (c) silicon oxide, (d) mixtures thereof, and (e) any of said a, b, c, and d, combined with stabilizers.
Claim 5
Dependent Claim
20 words
The catalyst device according to claims 3, wherein said washcoat further comprises stabilizers selected from barium oxide and cerium oxide.
Claim 6
Dependent Claim
22 words
The catalyst device according to claim 1, wherein said catalyst is selected from the group consisting of noble metals and mixtures thereof.
Claim 7
Dependent Claim
31 words
The catalyst device according to claim 1, wherein said substrate is provided in a configuration selected from the group consisting of a monolithic honeycomb, spun fibre, corrugated foil and layered material.
Claim 8
Dependent Claim
22 words
The catalyst device according to claim 1, wherein said electrically conductive material layer is of approximately the same area as said washcoat.
Claim 9
Dependent Claim
24 words
The catalyst device according to claim 1, wherein the washcoat and catalyst are present as a single layer over the electrically conductive material layer.
Claim 10
Dependent Claim
24 words
The catalyst device according to claim 1, wherein said electrically conductive material layer has an electrically resistivity less than 100 ohms at 0° C.
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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) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |