US3598170A
Expired / Lapsed
US
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Fluid-mold casting process
Assignee: Huntington Alloys Corp
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Filing: 1968-09-19
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Granted: 1971-08-10
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Expires: 1988-09-19
Abstract
Abstract A fluid-mold casting process produces nickel and nickel alloy ingots having improved surface and other metallurgical characteristics using a slag composition containing special amounts of alumina, lime, magnesium oxide, sodium oxide and alkaline earth metal fluoride.
Inventors
- 👤 James E Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/07; B22D27/00; B22D27/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A method in accordance with claim 1 wherein the casting slag contains about 35 percent to about 50 percent calcium oxide, about 25 percent to about 40 percent alumina, about 5 percent to about 15 percent magnesia, and about 10 percent to about 30 percent of an alkaline earth fluoride.
Claim 2
Dependent Claim
63 words
A method in accordance with claim 1 wherein the casting slag contains about 35 percent to about 40 percent calcium oxide, about 25 percent to about 40 percent alumina, about 5 percent to about 8 percent magnesia, about 3 percent to about 6 percent sodium oxide, about 10 percent to about 20 percent cryolite and about 5 percent to about 10 percent fluorspar.
Claim 3
Dependent Claim
65 words
A method in accordance with claim 1 wherein the casting slag contains about 35 percent to about 43 percent calcium oxide, about 27 percent to about 37 percent alumina, about 6 percent to about 10 percent magnesia, about 5 percent sodium oxide and about 15 percent to about 19 percent of a fluoride ingredient from the group consisting of fluorspar, cryolite and potassium aluminum fluoride.
Claim 4
Dependent Claim
40 words
A method in accordance with claim 1 wherein the casting slag contains about 37 percent calcium oxide, about 37 percent alumina, about 6 percent magnesia, about 5 percent sodium oxide about 5 percent calcium fluoride and about 10 percent cryolite.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |