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US3939002A
Expired / Lapsed
US
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Method of making a ceramic fiber replica of a body of reticulated organic foam
Assignee: Foseco International Ltd
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Filing: 1974-10-23
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Granted: 1976-02-17
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Expires: 1994-10-23
Abstract
Abstract The invention provides a porous refractory ceramic material having a high surface area per unit volume, a high resistance to sudden temperature variations and a low resistance to fluid flow. The material is a ceramic replica of a body of reticulated organic foam in which the ceramic consists essentially of fibrous material. Any non-fibrous particulate matter present is in an amount which makes no significant contribution to the strength of the body. The material is made by impregnating a body of reticulated organic foam with a slurry of finely-divided inorganic fibres, and drying and firing the thus -impregnated body. The material is of value as a catalyst support and as a facing element of burner assemblies.
Inventors
- 👤 Colin Washbourne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63408; B; B01; B01J; B01J35/00; B01J35/50; B01J35/58; B01J37/00; B01J37/0009; B01J37/0018; C04B38/00; C04B38/06; C04B38/0615
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A ceramic replica of a body of reticulated organic foam wherein the ceramic consists wholly or substantially of fibrous material, the average fiber length of the fibrous material being at most 50% of the diameter of the cells of the foam, and any non-fibrous particulate matter present making no significant contribution to the strength of the replica body.
Claim 2
Dependent Claim
58 words
A ceramic replica of a body of reticulated organic foam wherein the ceramic consists wholly or substantially of fibrous material, the average fiber length of the fibrous material being at most 50% of the diameter of the cells of the foam, and any non-fibrous particulate matter present making no significant contribution to the strength of the replica body.
Claim 3
Dependent Claim
15 words
A ceramic replica as recited in claim 1 wherein the fibrous material is aluminosilicate fiber.
Claim 4
Dependent Claim
25 words
A ceramic replica as recited in claim 1 wherein the length to diameter ratio of the fibers of the fibrous material is at least 10:1.
Claim 5
Independent Claim
94 words
A method of making a ceramic replica, consisting wholly or substantially of fibrous material, of a body of reticulated organic foam comprising the steps of impregnating a body of reticulated organic foam with a slurry of finely-divided inorganic fibers, the average fiber length of the fibrous material being at most 50% of the diameter of the cells of the foam, and any non-fibrous particulate matter present making no significant contribution to the strength of the body, drying the so-impregnated body, and firing the so-impregnated and dried body at a temperature of at least 500°C.
Claim 6
Independent Claim
94 words
A method of making a ceramic replica, consisting wholly or substantially of fibrous material, of a body of reticulated organic foam comprising the steps of impregnating a body of reticulated organic foam with a slurry of finely-divided inorganic fibers, the average fiber length of the fibrous material being at most 50% of the diameter of the cells of the foam, and any non-fibrous particulate matter present making no significant contribution to the strength of the body, drying the so-impregnated body, and firing the so-impregnated and dried body at a temperature of at least 500°C.
Claim 7
Dependent Claim
29 words
A method as recited in claim 4 comprising the further step of introducing a colloidal oxide hydrosol binder prior to firing to bond the fibrous material to coherent shape.
Claim 8
Dependent Claim
41 words
A method as recited in claim 4 wherein the foam is a polyurethane foam and wherein the slurry contains a modified polyvinyl polycarboxylic acid, and comprising the further step of treating the foam with monoethanolamine prior to impregnation of the foam.
References Cited (Backward Citations)
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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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |