US4462961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy for casting
Assignee: Nippon Light Metal Co Ltd
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Filing: 1982-10-26
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Granted: 1984-07-31
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Expires: 2002-10-26
Abstract
Abstract An aluminum alloy for casting purposes contains over 6% and up to 13% by weight of silicon, over 2% and up to 55% by weight of copper, over 0.25% and up to 1% by weight of magnesium, over 0.1% and up to 0.5% by weight of nickel, and over 0.03% and up to 1% by weight of antimony, in addition to aluminum and impurities. The copper and magnesium have a ratio by weight of about 3:1 to 8:1.
Inventors
- 👤 Tadao Ito
- 👤 Akio Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:56
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02; C22C21/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
An aluminum alloy for casting purposes which consists essentially of over 6% and up to 13% by weight of silicon, over 2% and up to 5% by weight of copper, over 0.25% and up to 1% by weight of magnesium, over 0.1% and up to 0.5% by weight of nickel and over 0.03% and up to 1% by weight of antimony, the balance being aluminum and impurities, said copper and said magnesium having a ratio by weight of about 3:1 to 8:1.
Claim 2
Dependent Claim
82 words
An aluminum alloy for casting purposes which consists essentially of over 6% and up to 13% by weight of silicon, over 2% and up to 5% by weight of copper, over 0.25% and up to 1% by weight of magnesium, over 0.1% and up to 0.5% by weight of nickel and over 0.03% and up to 1% by weight of antimony, the balance being aluminum and impurities, said copper and said magnesium having a ratio by weight of about 3:1 to 8:1.
Claim 3
Dependent Claim
44 words
An alloy as set forth in claim 1, further including at least one member selected from the group consisting of; more than 0.1% but not more than 0.5% by weight of zirconium; more than 0.1% but not more than 1% by weight of manganese.
Claim 4
Dependent Claim
21 words
An alloy as set forth in claim 1, containing more than 0.03% but not more than 2.0% by weight of titanium.
Claim 5
Dependent Claim
21 words
An alloy as set forth in claim 2, containing more than 0.03% but not more than 2.0% by weight of titanium.
References Cited (Backward Citations)
US3205069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |