US4714588A
Expired / Lapsed
US
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Aluminum alloy having improved properties
Assignee: Alcoa Corp
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Filing: 1984-12-20
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Granted: 1987-12-22
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Expires: 2004-12-20
Abstract
Abstract The present invention concerns a novel aluminum alloy. This alloy contains: -Si 6.5 to 7.5 -Mg 0.20 to 0.70% -Cu 1.0 to 1.6% - the remainder being constituted by aluminum and impurities the content of which is lower than 1.0%. It also concerns an aluminum alloy having improved properties.
Inventors
- 👤 Roger Huet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:00
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02; C22C21/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
44 words
An aluminum alloy consisting essentially of about the following percentages of materials: ______________________________________
Si 6.5 to 7.5%
Mg 0.50 to 0.70%
Cu 1.2 to 1.4%
______________________________________ the remainder being constituted by aluminum, grain refiner and impurities the content of which is lower than 1.0%.
Claim 2
Dependent Claim
44 words
An aluminum alloy consisting essentially of about the following percentages of materials: ______________________________________
Si 6.5 to 7.5%
Mg 0.50 to 0.70%
Cu 1.2 to 1.4%
______________________________________ the remainder being constituted by aluminum, grain refiner and impurities the content of which is lower than 1.0%.
Claim 3
Dependent Claim
15 words
Aluminum alloy according to claim 1 containing: ______________________________________
Si 7%
Mg 0.60%
Cu 1.3%
______________________________________
Claim 4
Dependent Claim
26 words
Alloy according to claim 1 wherein the impurities comprise: ______________________________________
Fe <0.1%
Zn <0.1%
Mn <0.1%
Ni <0.01%
Pb <0.01%
Sn <0.01%
P <5 ppm
______________________________________
Claim 5
Dependent Claim
11 words
A casting formed of an alloy as claimed in claim 1.
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) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |