Patent FR2383068A1 successfully refreshed from Google Patents.
US3935007A
Expired / Lapsed
US
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Aluminum alloy of age hardening type
Assignee: Sumitomo Light Metal Industries Ltd
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Filing: 1974-11-13
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Granted: 1976-01-27
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Expires: 1994-11-13
Abstract
Abstract An aluminum alloy of age-hardening type indispensably containing copper, magnesium and silicon, being optionally added thereto traces of any one or more than one element selected from vanadium, manganese, chromium, zirconium and titanium. A sheet or strip made from said alloy ingot, being submitted to solution treatment followed by precipitation process can improve forming properties, such as tensile strength, LDR and/or earing ratio, and be free from stretcher-strain marks. Said sheet or strip maintains high strength particularly when it is submitted to baking i.e. high temperature curing of paint coated thereon.
Inventors
- 👤 Yoshio Baba
- 👤 Mituhiro Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:02
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12; C22C21/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
An aluminum alloy of age-hardening type consisting essentially of: weight percent
______________________________________
Cu 1.2 to 1.9
Mg 0.4 to 1.0
Si 0.3 to 0.8
V 0.01 to 0.16
______________________________________ and balance aluminum and inevitable impurities.
Claim 2
Dependent Claim
35 words
An aluminum alloy of age-hardening type consisting essentially of: weight percent
______________________________________
Cu 1.2 to 1.9
Mg 0.4 to 1.0
Si 0.3 to 0.8
V 0.01 to 0.16
______________________________________ and balance aluminum and inevitable impurities.
Claim 3
Dependent Claim
39 words
An aluminum alloy sheet made of aluminum alloy as claimed in claim 1, being solution heat-treated continuously at more than 450°C for more than 10 seconds and being able to be handled in a coil form after said heat-treatment.
Claim 4
Dependent Claim
23 words
An aluminum sheet in accordance with claim 2 having been coated with paint and baked at a temperature of from 150°C to 250°C.
Claim 5
Dependent Claim
37 words
An aluminum alloy in accordance with claim 1 further including one or more of the following elements: weight percent
______________________________________
Mn 0.05 to 0.5
Cr 0.02 to 0.2
Zr 0.02 to 0.2
Ti 0.02 to 0.2.
______________________________________
References Cited (Backward Citations)
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US3392062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |