US2706680A
Expired / Lapsed
US
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Aluminum base alloy
Assignee: Alcoa Corp
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Filing: 1952-02-27
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Granted: 1955-04-19
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Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Charles B Criner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A MAGNESIUM-FREE ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, 5 TO 13% COPPER, 0.15 TO 1.7% MANGANESE, 0.05 TO 0.02% VANADIUM, AND 0.05 TO 0.30% ZIRCONIUM, THE IRON IMPURITY IN THE ALLOY NOT EXCEEDING 0.75% AND THE SILICON IMPURITY BEING NOT OVER 0.40%, THE AMOUNT OF MANGANESE BEING BETWEEN 3 AND 13% OF THE COPPER CONTENT, SAID ALLOY HAVING A HIGHER TENSILE STRENGHT AND RESISTANCE TO CREEP AT ELEVATED TEMPERATURE ON THE ORDER OF 400 AND 600* F., THAN THE SAME ALLOY DEVOID OF SAID MANGANESE, VANDIUM AND ZIRCONIUM COMPONENTS.
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) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |