US2784126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum base alloy
Assignee: Alcoa Corp
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Filing: 1953-04-22
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Granted: 1957-03-05
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Expires: 1973-04-22
Abstract
No abstract record available.
Inventors
- 👤 Charles B Criner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:09
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A SOLUTION HEAT TREATED AND PRECIPITATION HARDENED ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, FROM 5 TO 13% COPPER, 0.2 TO 1.7% MANGANESE, 0.05 TO 0.20% VANADIUM, 0.05 TO 0.30% ZIRCONIUM, AND 0.05 TO 0.70% MAGNESIUM, THE MAXIMUM IRON IMPURITY CONTENT OF SAID ALLOY BEING 0.75% AND THE MAXIMUM SILICON IMPURITY BEING 0.40%, SAID ALLOY HAVING AN INTERNAL STRUCTURE ESTABLISHED BY A SOLUTION HEAT TREATMENT OF FROM 1 TO 24 HOURS AT 960*F. TO 1020*F. AND A SUBSEQUENT PRECIPITATION HARDENING TREATMENT OF 1 TO 50 HOURS AT 350 TO 450*F., SAID THERMALLY TREATED ALLOY BEING CHARACTERIZED BY A HIGHER STRENGTH, A GREATER RESISTANCE TO CREEP AND A HIGHER FATIGUE STRENGTH AT ELEVATED TEMPERATURES ON THE ORDER OF 400*F. THAN THE SAME ALLOY DEVOID OF MAGNESIUM.
Claim 2
Dependent Claim
125 words
A SOLUTION HEAT TREATED AND PRECIPITATION HARDENED ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, FROM 5 TO 13% COPPER, 0.2 TO 1.7% MANGANESE, 0.05 TO 0.20% VANADIUM, 0.05 TO 0.30% ZIRCONIUM, AND 0.05 TO 0.70% MAGNESIUM, THE MAXIMUM IRON IMPURITY CONTENT OF SAID ALLOY BEING 0.75% AND THE MAXIMUM SILICON IMPURITY BEING 0.40%, SAID ALLOY HAVING AN INTERNAL STRUCTURE ESTABLISHED BY A SOLUTION HEAT TREATMENT OF FROM 1 TO 24 HOURS AT 960*F. TO 1020*F. AND A SUBSEQUENT PRECIPITATION HARDENING TREATMENT OF 1 TO 50 HOURS AT 350 TO 450*F., SAID THERMALLY TREATED ALLOY BEING CHARACTERIZED BY A HIGHER STRENGTH, A GREATER RESISTANCE TO CREEP AND A HIGHER FATIGUE STRENGTH AT ELEVATED TEMPERATURES ON THE ORDER OF 400*F. THAN THE SAME ALLOY DEVOID OF MAGNESIUM.
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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |