Patent US5449541A successfully refreshed from Google Patents.
US5449541A
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Electrically heatable honeycomb structures
Assignee: Corning Inc
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Filing: 1993-09-13
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Granted: 1995-09-12
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Expires: 2013-09-13
Abstract
Abstract Electrically conductive honeycomb structures are provided for use as catalytic converters, pre-heaters for catalytic converters, or particulate filters. The honeycomb structures are composed of subunits which are arranged to produce a serpentine conductive path through the honeycomb. The serpentine path gives the honeycomb an increased electrical resistance so that elevated temperatures can be achieved with less current. The subunits allow the serpentine current path to be produced without any slitting or cutting of the honeycomb.
Inventors
- 👤 G. Daniel Lipp
- 👤 Srinivas H. Swaroop
- 👤 Donald M. Trotter
- 👤 Raja R. Wusirika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:49
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2418; B01D29/00; B01D29/11; B01D29/31; B01D29/50; B01D29/52; B01D29/56; B01D29/76; B01D29/80; B01D29/84; B01D29/846; B01D46/0027; B01D46/0032; B01D46/2451; B01D46/2455; B01D46/2478; B01D46/2482; B01D46/2486; B01D46/249; F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/022; F01N3/0222; F01N3/023; F01N3/027; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/2026; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
83 words
An electrically conductive honeycomb structure comprising: (a) a plurality of electrically conductive honeycomb subunits; (b) first electrical conductor means attached to a first one of the subunits; and (c) second electrical conductor means attached to a second one of the subunits; wherein the subunits are attached to one another to form a serpentine electrically conductive path between the first and second subunits, each subunit, including the first and second subunits, being attached to and in electrical communication with at least one other subunit.
Claim 2
Dependent Claim
83 words
An electrically conductive honeycomb structure comprising: (a) a plurality of electrically conductive honeycomb subunits; (b) first electrical conductor means attached to a first one of the subunits; and (c) second electrical conductor means attached to a second one of the subunits; wherein the subunits are attached to one another to form a serpentine electrically conductive path between the first and second subunits, each subunit, including the first and second subunits, being attached to and in electrical communication with at least one other subunit.
Claim 3
Dependent Claim
21 words
The electrically conductive honeycomb structure of claim 1 wherein the subunits are attached to one another by an electrically conductive adhesive.
Claim 4
Dependent Claim
32 words
The honeycomb structure of claim 1 further comprising an electrically insulating member between a portion of the external surface of one subunit and a portion of the external surface of another subunit.
Claim 5
Dependent Claim
15 words
The honeycomb structure of claim 1 wherein each of the subunits is a rectangular parallelepiped.
Claim 6
Dependent Claim
17 words
The honeycomb structure of claim 1 wherein at least one of the subunits has a stepped cross-section.
Claim 7
Dependent Claim
25 words
The honeycomb structure of claim 5 wherein the cross-section is in a direction transverse to the longitudinal axis of the cells of the honeycomb structure.
Claim 8
Dependent Claim
24 words
The honeycomb structure of claim 1 wherein the serpentine conductive path is transverse to the longitudinal axis of the cells of the honeycomb structure.
Claim 9
Dependent Claim
85 words
An electrically conductive honeycomb structure comprising: (a) a first electrically conductive honeycomb subunit having an end surface; (b) a second electrically conductive honeycomb subunit having an end surface; and (c) a third electrically conductive honeycomb subunit attached to and in electrical communication with (i) the end surface of the first subunit and (ii) the end surface of the second subunit, the third subunit providing a conductive path between the first and second subunits, the first and second subunits being otherwise electrically isolated from one another.
Claim 10
Dependent Claim
85 words
An electrically conductive honeycomb structure comprising: (a) a first electrically conductive honeycomb subunit having an end surface; (b) a second electrically conductive honeycomb subunit having an end surface; and (c) a third electrically conductive honeycomb subunit attached to and in electrical communication with (i) the end surface of the first subunit and (ii) the end surface of the second subunit, the third subunit providing a conductive path between the first and second subunits, the first and second subunits being otherwise electrically isolated from one another.
Claim 11
Dependent Claim
29 words
The electrically conductive honeycomb structure of claim 8 wherein the third subunit is attached to the end surfaces of the first and second subunits by an electrically conductive adhesive.
Claim 12
Dependent Claim
34 words
The honeycomb structure of claim 8 further comprising an electrically insulating member between a portion of the external surface of the first subunit and a portion of the external surface of the second subunit.
Claim 13
Dependent Claim
23 words
The honeycomb structure of claim 8 wherein the conductive path is transverse to the longitudinal axis of the cells of the honeycomb structure.
Claim 14
Dependent Claim
57 words
An electrically conductive honeycomb structure comprising: (a) a first electrically conductive honeycomb subunit; and (b) a second electrically conductive honeycomb subunit comprising two portions of different thicknesses, the first subunit being attached to and in electrical communication with the thicker portion of the second subunit, the first and second subunits being otherwise electrically isolated from one another.
Claim 15
Dependent Claim
57 words
An electrically conductive honeycomb structure comprising: (a) a first electrically conductive honeycomb subunit; and (b) a second electrically conductive honeycomb subunit comprising two portions of different thicknesses, the first subunit being attached to and in electrical communication with the thicker portion of the second subunit, the first and second subunits being otherwise electrically isolated from one another.
Claim 16
Dependent Claim
27 words
The electrically conductive honeycomb structure of claim 12 wherein the first subunit is attached to the thicker portion of the second subunit by an electrically conductive adhesive.
Claim 17
Dependent Claim
34 words
The honeycomb structure of claim 12 further comprising an electrically insulating member between a portion of the external surface of the first subunit and a portion of the external surface of the second subunit.
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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) | 1998-09-11 | 1999-03-13 | 1999-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-11 | 2003-03-13 | 2003-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-11 | 2007-03-13 | 2007-09-12 | $7700.00 | Window Closed / Lapsed |