US4054702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolith design
Assignee: WR Grace and Co
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Filing: 1976-03-05
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Granted: 1977-10-18
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Expires: 1996-03-05
Abstract
Abstract Monoliths made by joining ribbed sheet together have a tendency to collapse when the ribs of adjacent layers do not coincide. When the monolith is made by winding embossed sheet around a mandrel there will always be places where ribs do not coincide and which tend to collapse. This deficiency is minimized by using sheet with ribs having un-equal separation. Such sheet is obtained by embossing with a roll designed for this purpose, and the monoliths of this invention have unique features of channel dimensions.
Inventors
- 👤 Christian Bent Lundsager
- 👤 Edwin M. Glocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:18
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2828; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J; B01J35/00; B01J35/50; B01J35/56; B28; B28B; B28B1/00; B28B1/002; B28B11/00; B28B11/003; C; C04; C04B; C04B38/00; C04B38/008; C04B38/0083; F01N2330/00; F01N2330/06; F01N2330/20; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/24744
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
In an improved ceramic monolith structure prepared by winding successive layers of a rib embossed sheet to provide a structure having channels along the length thereof, said channels having essentially the same dimension in a direction perpendicular to the axis of winding, and subsequently treating said sheet to form a ceramic structure, the improvement comprising embossing said sheet with a repeating pattern in which the dimension from rib to adjacent rib is unequal and which has a repeating length which is greater than 2 π times the thickness of the layers of the embossed sheet.
Claim 2
Dependent Claim
95 words
In an improved ceramic monolith structure prepared by winding successive layers of a rib embossed sheet to provide a structure having channels along the length thereof, said channels having essentially the same dimension in a direction perpendicular to the axis of winding, and subsequently treating said sheet to form a ceramic structure, the improvement comprising embossing said sheet with a repeating pattern in which the dimension from rib to adjacent rib is unequal and which has a repeating length which is greater than 2 π times the thickness of the layers of the embossed sheet.
Claim 3
Dependent Claim
15 words
The ceramic monolith acording to claim 1 wherein the repeating pattern is a random pattern.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |