US3887741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-walled honeycombed substrate with axial discontinuities in the periphery
Assignee: Corning Glass Works
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Filing: 1973-08-13
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Granted: 1975-06-03
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Expires: 1993-08-13
Abstract
Abstract Ceramic substrate comprising a multiplicity of open-ended cells are provided with a grooved periphery where the grooves extend transversely with respect to the axes of the open-ended cells. These grooves enhance the thermal shock resistance of the structure. When the structure is utilized as a substrate in a catalytic reactor and held in place by flanges blocking the flow of gases through the peripheral cells of the substrate, the grooves extend through the walls of the peripheral cells.
Inventors
- 👤 Thomas J Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:41
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/0006; F; F01; F01N; F01N13/00; F01N13/009; F01N13/0097; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2828; F01N3/2839; F01N3/2842; F01N2330/00; F01N2330/06; F01N2350/00; F01N2350/02; F01N2350/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24744; Y10T428/24777; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/2976
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
80 words
A thermally shock resistant honeycombed structure comprising a plurality of thin walls forming open-ended cells of substantially polygonal, straight-sided cross-section and having axes extending from one end of said structure to the other end, said thin walls of at least 70% of said cells in a layer adjacent the periphery having an axial discontinuity in at least one location between said one end and said other end, said cells located centrally of said layer having substantially axially continuous cell walls.
Claim 2
Dependent Claim
80 words
A thermally shock resistant honeycombed structure comprising a plurality of thin walls forming open-ended cells of substantially polygonal, straight-sided cross-section and having axes extending from one end of said structure to the other end, said thin walls of at least 70% of said cells in a layer adjacent the periphery having an axial discontinuity in at least one location between said one end and said other end, said cells located centrally of said layer having substantially axially continuous cell walls.
Claim 3
Dependent Claim
81 words
A THERMALLY SHOCK RESISTANT HONEYCOMBED STRUCTURE COMPRISING A PLURALITY OF THIN WALLS FORMING OPEN-ENDED CELLS OF SUBSTANTIALLY POLYGONAL, STRAIGHT-SIDED CROSS-SECTION AND HAV: ING AXES EXTENDING FROM ONE END OF SAID STRUCTURE TO THE OTHER END, SAID THIN WALLS OF AT LEAST 70% OF SAID CELLS IN A LAYER ADJACENT THE PERIPHERY HAVING AN AXIAL DISCONTINUITY IN AT LEAST ONE LOCATION BETWEEN SAID ONE END AND SAID OTHER END, SAID CELLS LOCATED CENTRALLY OF SAID LAYER HAVING SUBSTANTIALLY AXIALLY CONTINUOUS CELL WALLS.
Claim 4
Dependent Claim
81 words
A THERMALLY SHOCK RESISTANT HONEYCOMBED STRUCTURE COMPRISING A PLURALITY OF THIN WALLS FORMING OPEN-ENDED CELLS OF SUBSTANTIALLY POLYGONAL, STRAIGHT-SIDED CROSS-SECTION AND HAV: ING AXES EXTENDING FROM ONE END OF SAID STRUCTURE TO THE OTHER END, SAID THIN WALLS OF AT LEAST 70% OF SAID CELLS IN A LAYER ADJACENT THE PERIPHERY HAVING AN AXIAL DISCONTINUITY IN AT LEAST ONE LOCATION BETWEEN SAID ONE END AND SAID OTHER END, SAID CELLS LOCATED CENTRALLY OF SAID LAYER HAVING SUBSTANTIALLY AXIALLY CONTINUOUS CELL WALLS.
Claim 5
Dependent Claim
31 words
The structure of claim 1 wherein the periphery has a plurality of discretE discontinuities, each of said discontinuities creating an axial discontinuity in less than the entire periphery of the structure.
Claim 6
Dependent Claim
24 words
The structure of claim 1 wherein said discontinuity is created by at least one groove extending substantially transversely to the axes of said cells.
Claim 7
Dependent Claim
32 words
The structure of claim 3 wherein said groove extends along a line substantially perpendicular to the axes of the cells so as to circumscribe a section of the structure at the periphery.
Claim 8
Dependent Claim
11 words
The structure of claim 4 including more than one said groove.
Claim 9
Dependent Claim
27 words
The structure of claim 3 including more than one said groove, each said groove creating an axial discontinuity in less than the entire periphery of the structure.
Claim 10
Dependent Claim
33 words
The structure of claim 3 wherein said groove is inclined with respect to a line perpendicular to said axes of said cells so as to form a substantially helical groove at said periphery.
Claim 11
Dependent Claim
12 words
The structure of claim 1 wherein said structure comprises a ceramic material.
Claim 12
Dependent Claim
10 words
The structure of claim 1 wherein said structure is monolithic.
Claim 13
Dependent Claim
29 words
The structure of claim 1 wherein said periphery comprises a skin circumscribing said cells adjacent said periphery, said skin and said cell walls comprising substantially the same sintered material.
Claim 14
Dependent Claim
60 words
A thermally shock resistant honeycombed structure comprising a plurality of open-ended cells of substantially polygonal, straight-sided cross-section extending through the structure, the periphery of said structure including at least one groove between the end of the structure extending generally transversely to the axes of the cells, all of said cell walls located centrally of said groove being substantially axially continuous.
Claim 15
Dependent Claim
60 words
A thermally shock resistant honeycombed structure comprising a plurality of open-ended cells of substantially polygonal, straight-sided cross-section extending through the structure, the periphery of said structure including at least one groove between the end of the structure extending generally transversely to the axes of the cells, all of said cell walls located centrally of said groove being substantially axially continuous.
Claim 16
Dependent Claim
19 words
The structure of claim 11 wherein said at least one groove extends around a substantial portion of the periphery.
Claim 17
Dependent Claim
13 words
The structure of claim 11 wherein said groove has a substantially uniform depth.
Claim 18
Dependent Claim
10 words
The structure of claim 11 wherein said structure is monolithic.
Claim 19
Dependent Claim
11 words
The structure of claim 14 wherein said periphery comprises a skin.
Claim 20
Dependent Claim
20 words
The structure of claim 15 wherein said groove extends along a line generally perpendicular to the axes of said cells.
Claim 21
Dependent Claim
11 words
The structure of claim 16 including more than one said groove.
Claim 22
Dependent Claim
12 words
The structure of claim 11 wherein said structure comprises a ceramic material.
Claim 23
Dependent Claim
98 words
A thermally shock resistant, sintered honeycombed structure comprising a plurality of thin walls forming open-ended cells having axes extending from one end of said structure to the other end and having a skin at the periphery thereof, said skin and said walls comprising substantially the same sintered material, said skin having an axial discontinuity in at least one location between said one end and said other end so as to provide thermal shock resistance, said skin being axially discontinuous along a substantial portion of the periphery and said cell walls being substantially axially continuous centrally of the periphery.
Claim 24
Dependent Claim
98 words
A thermally shock resistant, sintered honeycombed structure comprising a plurality of thin walls forming open-ended cells having axes extending from one end of said structure to the other end and having a skin at the periphery thereof, said skin and said walls comprising substantially the same sintered material, said skin having an axial discontinuity in at least one location between said one end and said other end so as to provide thermal shock resistance, said skin being axially discontinuous along a substantial portion of the periphery and said cell walls being substantially axially continuous centrally of the periphery.
Claim 25
Dependent Claim
18 words
The honeycombed structure of claim 19 wherein said discontinuity aggregately extends around at least 70% of the periphery.
Claim 26
Dependent Claim
18 words
The honeycombed structure of claim 19 wherein the axial discontinuity is at least 1/32 of an inch deep.
Claim 27
Dependent Claim
17 words
The honeycombed structure of claim 19 wherein the axial discontinuity comprises a groove having a rounded base.
Claim 28
Dependent Claim
12 words
The structure of claim 11 wherein said groove has a rounded base.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |