US4432936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adding insoluble material to a liquid or partially liquid metal
Assignee: Dow Chemical Co
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Filing: 1982-08-27
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Granted: 1984-02-21
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Expires: 2002-08-27
Abstract
Abstract The invention is a method for adding substantially insoluble material to an at least partially liquid metal. The method comprises providing a combination of a first metal having discrete degenerate dendrites and a plurality of insoluble particles at least partially suspended in the first metal. The combination is mixed with a second metal at a temperature above the solidus temperature of the first metal and the second metal. The second metal is capable of forming a dendritic structure when cooled from a liquid state to a solid state. The mixture is then solidified into a dendritic-containing metallic structure having a plurality of substantially insoluble particles at least partilly suspended in the structure.
Inventors
- 👤 Earl K. Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:03
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C1/10; C22C1/1036; C22C1/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A method for adding substantially insoluble material to an at least partially liquid metal comprising: (a) providing combination of a first metal having discrete degenerate dendrites and a plurality of substantially insoluble particles at least partially suspended in the first metal; (b) mixing the composite with a second metal at a temperature greater than the solidus temperature of both the first metal and the second metal, said second metal being capable of forming a dendritic structure upon cooling from a liquid state to a solid state; and (c) solidifying the mixture into a dendritic structure having a plurality of substantially insoluble particles at least partially suspended in the structure.
Claim 2
Independent Claim
109 words
A method for adding substantially insoluble material to an at least partially liquid metal comprising: (a) providing combination of a first metal having discrete degenerate dendrites and a plurality of substantially insoluble particles at least partially suspended in the first metal; (b) mixing the composite with a second metal at a temperature greater than the solidus temperature of both the first metal and the second metal, said second metal being capable of forming a dendritic structure upon cooling from a liquid state to a solid state; and (c) solidifying the mixture into a dendritic structure having a plurality of substantially insoluble particles at least partially suspended in the structure.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the first metal and the second metal have substantially the same chemical composition.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the mixture is solidified during casting.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein the first metal and the second metal are independently selected from the group consisting of magnesium, aluminum, copper, iron, lead, zinc, nickel, cobalt and alloys thereof.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the first metal and the second metal are independently selected from the group consisting of magnesium, aluminum or alloys thereof.
Claim 7
Dependent Claim
31 words
The method of claim 1 wherein the substantially insoluble material is selected from the group consisting of graphite, metal carbides, sand, glass, ceramics, metal oxides, substantially pure metals and metal alloys.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the substantially insoluble material is a metal oxide.
Claim 9
Dependent Claim
14 words
The method of claim 7 wherein the metal oxide is an oxide of aluminum.
Claim 10
Independent Claim
124 words
A method for adding substantially insoluble material to an at least partially liquid metal comprising: (a) providing combination of a first metal having discrete degenerate dendrites and a plurality of substantially insoluble particles at least partially suspended in the first metal; (b) mixing the composite with a second metal at a temperature greater than the solidus temperature of both the first metal and the second metal, said second metal being capable of forming a dendritic structure upon cooling from a liquid state to a solid state, said second metal having a composition substantially different from the composition of said first metal; and (c) solidifying the mixture into a dendritic structure having a plurality of substantially insoluble particles at least partially suspended in the structure.
Claim 11
Independent Claim
124 words
A method for adding substantially insoluble material to an at least partially liquid metal comprising: (a) providing combination of a first metal having discrete degenerate dendrites and a plurality of substantially insoluble particles at least partially suspended in the first metal; (b) mixing the composite with a second metal at a temperature greater than the solidus temperature of both the first metal and the second metal, said second metal being capable of forming a dendritic structure upon cooling from a liquid state to a solid state, said second metal having a composition substantially different from the composition of said first metal; and (c) solidifying the mixture into a dendritic structure having a plurality of substantially insoluble particles at least partially suspended in the structure.
References Cited (Backward Citations)
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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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |