Patent JPS5952394A successfully refreshed from Google Patents.
US4216183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making furnace lining
Assignee: Selas Corp of America
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Filing: 1975-08-22
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Granted: 1980-08-05
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Expires: 1995-08-22
Abstract
Abstract The method for making material to be used as a furnace lining, comprising forming a block of ceramic fibers in a desired shape and fusing the surface thereof with a flame at a temperature higher than any temperature to which it is intended that the material will be subjected when in use.
Inventors
- 👤 Ernst A. Siemssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:33
CPC Classifications
C; C04; C04B; C04B30/00; C04B30/02; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; F27D1/0009
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
In a method of preparing lightweight, erosion resistant elements having low heat inertia to be used as furnace lining, the steps comprising forming a rigid block of ceramic fiber material of a predetermined shape and thickness, said ceramic fiber material comprising alumina and silicon oxide, subjecting the surface of the block that is to face the furnace interior to the action of a high temperature flame, melting the ceramic fibers of a thin layer of said surface with said flame, and causing the melted thin layer of said surface to solidify into a smooth non-fibrous thin hard crust, said high temperature flame being at a temperature higher than any temperature to which said surface is intended to be subjected when in use within said furnace.
Claim 2
Dependent Claim
125 words
In a method of preparing lightweight, erosion resistant elements having low heat inertia to be used as furnace lining, the steps comprising forming a rigid block of ceramic fiber material of a predetermined shape and thickness, said ceramic fiber material comprising alumina and silicon oxide, subjecting the surface of the block that is to face the furnace interior to the action of a high temperature flame, melting the ceramic fibers of a thin layer of said surface with said flame, and causing the melted thin layer of said surface to solidify into a smooth non-fibrous thin hard crust, said high temperature flame being at a temperature higher than any temperature to which said surface is intended to be subjected when in use within said furnace.
Claim 3
Dependent Claim
31 words
The method of claim 1 in which said high temperature flame is an oxy-acetylene flame at approximately 5600° F. and the intended furnace temperature is no more than about 2300° F.
Claim 4
Dependent Claim
34 words
The method of claim 1 in which the block of ceramic fiber material is shaped to form the cup of a radiant burner and wherein said high temperature flame is applied to the cup.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein said forming step comprises molding.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said forming step comprises cutting.
Claim 7
Dependent Claim
27 words
The method of claim 1 wherein said melting step is continued only long enough to produce a hard surface layer about an eighth of an inch thick.
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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |