US3933476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain refining of aluminum
Assignee: Elkem Metals Co LP
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Filing: 1974-10-04
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Granted: 1976-01-20
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Expires: 1994-10-04
Abstract
Abstract Grain refining of aluminum using an addition of titanium, aluminum and KBF 4 .
Inventors
- 👤 Kuldip S. Chopra
- 👤 William D. Forgeng
- 👤 Nicholas J. Pappas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:04
CPC Classifications
C; C22; C22C; C22C21/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A method for grain refining aluminum which comprises a. providing a bath of molten aluminum base metal b. making an addition to the bath of molten aluminum in the form of a blended mixture consisting essentially of finely divided titanium, aluminum and KBF 4 , the aggregate amount of titanium in the addition being at least about 0.005% by weight of the molten metal and being in an amount sufficient to provide in the molten bath a percentage titanium content selected from the range of about 0.01 to 0.08%, the aggregate amount of KBF 4 in the addition being such as to contain boron in an amount equivalent to a percentage of the molten bath falling within the polygon (A) of the graph of FIG. 1 of the drawing corresponding to the selected percentage of titanium, the amount of aluminum being from about one-tenth to 4 times the weight of titanium in the mixture.
Claim 2
Independent Claim
154 words
A method for grain refining aluminum which comprises a. providing a bath of molten aluminum base metal b. making an addition to the bath of molten aluminum in the form of a blended mixture consisting essentially of finely divided titanium, aluminum and KBF 4 , the aggregate amount of titanium in the addition being at least about 0.005% by weight of the molten metal and being in an amount sufficient to provide in the molten bath a percentage titanium content selected from the range of about 0.01 to 0.08%, the aggregate amount of KBF 4 in the addition being such as to contain boron in an amount equivalent to a percentage of the molten bath falling within the polygon (A) of the graph of FIG. 1 of the drawing corresponding to the selected percentage of titanium, the amount of aluminum being from about one-tenth to 4 times the weight of titanium in the mixture.
Claim 3
Dependent Claim
23 words
A method in accordance with claim 1 wherein the amount of boron in the mixture is determined from region (B) of FIG. 1.
Claim 4
Dependent Claim
27 words
A method in accordance with claim 1 wherein the amount of boron in the mixture is determined from the region (C) of the graph of FIG. 1.
Claim 5
Dependent Claim
27 words
A method in accordance with claim 1 wherein the amount of boron in the mixture is determined from the region (D) of the graph of FIG. 1.
Claim 6
Dependent Claim
21 words
A method in accordance with claim 1 wherein the amount of boron in the mixture is determined from the region (E).
Claim 7
Dependent Claim
54 words
An addition agent for refining aluminum, base metal consisting essentially of compacted blended mixture of titanium, aluminum and KBF 4 wherein the titanium and boron contents are in proportions which intersect in region (E) of FIG. 1 and the aluminum content is from about one-tenth to 4 times the amount of the titanium content.
Claim 8
Dependent Claim
54 words
An addition agent for refining aluminum, base metal consisting essentially of compacted blended mixture of titanium, aluminum and KBF 4 wherein the titanium and boron contents are in proportions which intersect in region (E) of FIG. 1 and the aluminum content is from about one-tenth to 4 times the amount of the titanium content.
References Cited (Backward Citations)
US3592637A
Cited
US3854935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |