Patent US3467891A successfully refreshed from Google Patents.
US3877973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of permeable materials
Assignee: Foseco International Ltd
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Filing: 1972-12-29
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Granted: 1975-04-15
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Expires: 1992-12-29
Abstract
Abstract A method of making an article of highly permeable material having on at least one surface of the article an impermeable facing layer, said method comprising: forming a pattern of organic foam material; lining a surface of the organic foam material with a layer of absorbent material; impregnating the pattern and lining with a liquid slurry of ceramic material; removing surplus slurry and drying and heating the assembly to form a ceramic foam article of large-celled structure and high permeability having a layer of fine-pored structure on the surface corresponding to the surface of the organic foam which was lined with absorbent material; applying a glazing frit to the layer of fine-pored structure; and heating to cause the frit to fuse to produce an impermeable facing.
Inventors
- 👤 Frank Ernest George Ravault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B38/00; C04B38/06; C04B38/0615; C04B41/45; C04B41/50; C04B41/5022; C04B41/80; C04B41/81; C04B41/85; C04B41/86
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A METHOD OF MAKING AN ARTICLE OF HIGLY PERMEABLE MATERIAL HAING ON AT LEAST ONE SURFACE OF THE ARTICLE AN IMPERMEABLE AFACING LAYER, SAID METHOD COMPRISING: FORMING A PATERN OF ORGANIC FOAM MATERIAL; LINING A SURFACE OF THE ORGANIC FOAM MATERIAL WITH A LAYER OF ABSORBENT MATERIAL; IMPREGNATING THE PATTERN AND LINING WITH A LIQUID SLURRY OF CERAMIC MATERIAL REMOVING SULPHURS SLURRY AND DRYING AND HEATING THE ASSEMBLY TO FORM A CERAMIC FOAM ARTICLE OF LARGE-CELLED STRUCTURE AND HIGH PERMEABILITY HAVING A LAYER OF FINE-PORED STRUCTURE ON THE SURFACE CORRESPONDING TO THE SURFACE OF THE ORGANIC FOAM WHICH WAS LINED WITH ABSORBENT MATERIAL; APPLYING A GLAZING FRIT TO THE LAYER OF FINE-PORED STRUCTURE; AND HEATING TO CAUSE THE FRIT TO FUSE TO PRODUCE AN IMPERMEABLE FACING
Claim 2
Independent Claim
126 words
A METHOD OF MAKING AN ARTICLE OF HIGLY PERMEABLE MATERIAL HAING ON AT LEAST ONE SURFACE OF THE ARTICLE AN IMPERMEABLE AFACING LAYER, SAID METHOD COMPRISING: FORMING A PATERN OF ORGANIC FOAM MATERIAL; LINING A SURFACE OF THE ORGANIC FOAM MATERIAL WITH A LAYER OF ABSORBENT MATERIAL; IMPREGNATING THE PATTERN AND LINING WITH A LIQUID SLURRY OF CERAMIC MATERIAL REMOVING SULPHURS SLURRY AND DRYING AND HEATING THE ASSEMBLY TO FORM A CERAMIC FOAM ARTICLE OF LARGE-CELLED STRUCTURE AND HIGH PERMEABILITY HAVING A LAYER OF FINE-PORED STRUCTURE ON THE SURFACE CORRESPONDING TO THE SURFACE OF THE ORGANIC FOAM WHICH WAS LINED WITH ABSORBENT MATERIAL; APPLYING A GLAZING FRIT TO THE LAYER OF FINE-PORED STRUCTURE; AND HEATING TO CAUSE THE FRIT TO FUSE TO PRODUCE AN IMPERMEABLE FACING
Claim 3
Dependent Claim
33 words
A method as in claim 1 wherein the step of lining a surface of the organic foam pattern includes applying a slurry of fibres to said surface and removing liquid from the slurry.
Claim 4
Dependent Claim
25 words
A method as in claim 1 wherein the step of lining a surface of the organic foam pattern includes applying unsized paper to said surface.
Claim 5
Independent Claim
133 words
A method of making an article of highly permeable material having on at least one surface of the article an impermeable facing layer, said method comprising: forming a pattern of organic foam material; impregnating the pattern with a liquid slurry of ceramic material; removing surplus slurry and drying and heating the assembly to form a ceramic foam article of large-celled structure; lining a surface of the article with a layer of absorbent material; impregnating the article and lining with a liquid slurry of ceramic material; removing surplus slurry and drying and heating the assembly to form a layer of fine-pored structure on the surface which was lined with absorbent material; appLying a glazing frit to the layer of fine-pored structure; and heating to cause the frit to fuse and produce an impermeable facing.
Claim 6
Independent Claim
133 words
A method of making an article of highly permeable material having on at least one surface of the article an impermeable facing layer, said method comprising: forming a pattern of organic foam material; impregnating the pattern with a liquid slurry of ceramic material; removing surplus slurry and drying and heating the assembly to form a ceramic foam article of large-celled structure; lining a surface of the article with a layer of absorbent material; impregnating the article and lining with a liquid slurry of ceramic material; removing surplus slurry and drying and heating the assembly to form a layer of fine-pored structure on the surface which was lined with absorbent material; appLying a glazing frit to the layer of fine-pored structure; and heating to cause the frit to fuse and produce an impermeable facing.
Claim 7
Dependent Claim
33 words
A method as in claim 4 wherein the step of lining a surface of the ceramic foam article includes applying a slurry of fibres to said surface and removing liquid from the slurry.
Claim 8
Dependent Claim
25 words
A method as in claim 4 wherein the step of lining a surface of the ceramic foam article includes applying unsized paper to said surface.
Claim 9
Independent Claim
118 words
A METHOD OF MAKING A GAS BURNER BLOCK WHICH COMPRISES FORMING A PATTERN OR ORGANIC FOAM MATERIAL IN THE SHAPE OF A BLOCK HAVING ONE FACE CONSTRUCTED OF FINELY PORED FOAM, AND HAVING A CHANNELS RUNNING ACROSS THE BLOCK, LINING THE CHANNELS WITH ABSORBENT MATERIAL, IMPREGNATING THE FOAM AND ABSORBENT MATERIAL WITH A SLURRY OF CERAMIC MATERIAL REMOVING SURPLUS SLURRY, DRYING AND FIRING THE BLOCK, PROVIDING THE WALLS OF THE CHANNELS AND AT LEAST ONE FACE OF THE BLOCK, WITH A FINE-PORED SURFACE, APPLYING A GLAZE FROM A SLURRY TO THE FINE-PORED FACE AND THE INTERIOR WALLS OF THE CHANNELS, AND DRYING AND FIRING THE BLOCK TO A TEMPERATURE SUFFICIENT TO FUSE THE GLAZE TO AN IMPERMEABLE COATING.
Claim 10
Independent Claim
118 words
A METHOD OF MAKING A GAS BURNER BLOCK WHICH COMPRISES FORMING A PATTERN OR ORGANIC FOAM MATERIAL IN THE SHAPE OF A BLOCK HAVING ONE FACE CONSTRUCTED OF FINELY PORED FOAM, AND HAVING A CHANNELS RUNNING ACROSS THE BLOCK, LINING THE CHANNELS WITH ABSORBENT MATERIAL, IMPREGNATING THE FOAM AND ABSORBENT MATERIAL WITH A SLURRY OF CERAMIC MATERIAL REMOVING SURPLUS SLURRY, DRYING AND FIRING THE BLOCK, PROVIDING THE WALLS OF THE CHANNELS AND AT LEAST ONE FACE OF THE BLOCK, WITH A FINE-PORED SURFACE, APPLYING A GLAZE FROM A SLURRY TO THE FINE-PORED FACE AND THE INTERIOR WALLS OF THE CHANNELS, AND DRYING AND FIRING THE BLOCK TO A TEMPERATURE SUFFICIENT TO FUSE THE GLAZE TO AN IMPERMEABLE COATING.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |