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US3794531A
Expired / Lapsed
US
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Method of using a highly stable aluminum alloy in the production of recrystallization hardened products
Assignee: FA FUCHS O DT
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Filing: 1971-10-21
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Granted: 1974-02-26
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Expires: 1991-10-21
Abstract
Abstract A METHOD OF USING A HIGHLY STABLE ALUMINUM ALLOY OF THE ALZNMGCU TYPE CONSISTING ESSENTIALLY OF 1.1 TO 1.3% COPPER, 2.3 TO 2.7% MAGNESIUM, 5.7 TO 7.1% ZINC, 0.2 TO 0.5% SILVER, 0 TO 0.09% MANGANESE, 0.02 TO 0.08% CHROMIUM UM, 0.002 TO 0.0006% BORON, AND 0.04 TO 0.08% CHROMIUM IN COMBINATION WITH 0.10 TO 0.16% ZIRCONIUM, AS MATERIAL FOR PRODUCING RECRYSTALLIZATION-HARDENED SEMI-FINISHED CORROSION RESISTANT PRODUCTS BY SUBJECTING THE ALLOY TO A SOLUTION TREATMENT, AND THEREAFTER TO LOW-RATE COOLING.
Inventors
- 👤 M Markworth
- 👤 F Lynker
- 👤 W Rosenkranz
- 👤 B Rosenkranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |