US3856076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for containing the molten reaction products of a reactive cladding process
Assignee: United States Steel Corp
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Filing: 1973-02-15
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Granted: 1974-12-24
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Expires: 1993-02-15
Abstract
Abstract Method and apparatus for containing the molten reaction products of a reactive cladding process, such as an aluminothermic reduction cladding process, in which a refractory-lined perimeter rests on either a sand bed or a steel base. A second perimeter surrounding the inner perimeter and forming an annular space therewith is also situated on either the sand bed or the steel base. Sand placed in the annular space between the two perimeters chills any molten reaction products which escape the confines of the inner perimeter, preventing any spread of this material.
Inventors
- 👤 R Adams
- 👤 W Rall
- 👤 R Kachik
- 👤 A Pignocco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:19
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
Apparatus for containing the molten reaction products of a reactive cladding process, comprising: a base, a metal substrate resting on said base, an outer perimeter shell of predetermined size and configuration resting on said base around said substrate, said shell being substantially larger than said substrate, a refractory-lined inner perimeter shell of predetermined size and configuration resting on said substrate, enclosing exactly that portion of said substrate to be clad, and spaced from said outer perimeter, said inner perimeter and said outer perimeter defining an annular space for containing an insulating material, and insulating material in said space.
Claim 2
Dependent Claim
98 words
Apparatus for containing the molten reaction products of a reactive cladding process, comprising: a base, a metal substrate resting on said base, an outer perimeter shell of predetermined size and configuration resting on said base around said substrate, said shell being substantially larger than said substrate, a refractory-lined inner perimeter shell of predetermined size and configuration resting on said substrate, enclosing exactly that portion of said substrate to be clad, and spaced from said outer perimeter, said inner perimeter and said outer perimeter defining an annular space for containing an insulating material, and insulating material in said space.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1 further comprising means connected to said perimeter shells for positioning said inner and outer perimeters.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 2 wherein said positioning means are flanges fixed to said perimeter shells.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 1 wherein said inner perimeter is lined with graphite.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 1 wherein said insulating material is particulate matter.
Claim 7
Dependent Claim
11 words
Apparatus according to claim 5 wherein said particulate matter is sand.
Claim 8
Dependent Claim
10 words
Apparatus according to claim 1 wherein said base is metal.
Claim 9
Dependent Claim
29 words
Apparatus for preventing carbon contamination of low-carbon steels during a reactive cladding process comprising apparatus according to claim 4 wherein said graphite lining is at least 2 inches thick.
Claim 10
Dependent Claim
25 words
Apparatus according to claim 1 wherein the height of the refractory lining of said inner perimeter shell is less than the height of said shell.
Claim 11
Dependent Claim
28 words
Apparatus according to claim 1 further comprising a refractory cover comprising at least one refractory plate adapted to fit atop said refractory lining within said inner perimeter shell.
Claim 12
Dependent Claim
11 words
Apparatus according to claim 10 wherein said refractory plate is graphite.
Claim 13
Dependent Claim
22 words
Apparatus according to claim 10 wherein said cover is provided with an access hole through which the reactive cladding process is initiated.
Claim 14
Dependent Claim
15 words
Apparatus according to claim 1 wherein said outer perimeter is interiorly lined with refractory material.
Claim 15
Dependent Claim
121 words
Apparatus for containing the molten reaction products of a reactive cladding process comprising: a sand bed, a metal substrate resting on said sand bed, the top of said substrate being at the same level as the level of the sand, an inner perimeter comprising a metal shell interiorly lined with a refractory material, said perimeter having substantially the exact interior dimensions of said substrate, said perimeter being positioned on said leveled sand bed around said substrate, an outer perimeter shell of predetermined size and configuration resting on said sand bed around said inner perimeter, said outer perimeter being substantially larger than said inner perimeter whereby said inner and outer perimeters form an annular space therebetween, and insulating material in said space.
Claim 16
Dependent Claim
121 words
Apparatus for containing the molten reaction products of a reactive cladding process comprising: a sand bed, a metal substrate resting on said sand bed, the top of said substrate being at the same level as the level of the sand, an inner perimeter comprising a metal shell interiorly lined with a refractory material, said perimeter having substantially the exact interior dimensions of said substrate, said perimeter being positioned on said leveled sand bed around said substrate, an outer perimeter shell of predetermined size and configuration resting on said sand bed around said inner perimeter, said outer perimeter being substantially larger than said inner perimeter whereby said inner and outer perimeters form an annular space therebetween, and insulating material in said space.
Claim 17
Dependent Claim
11 words
Apparatus according to claim 14 wherein said refractory material is graphite.
Claim 18
Dependent Claim
32 words
Apparatus for preventing carbon contamination of low carbon and stainless steels during a reactive cladding process comprising apparatus according to claim 15 wherein said graphite lining is at least 2 inches thick.
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |