US2915391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum base alloy
Assignee: Alcoa Corp
•
Filing: 1958-01-13
•
Granted: 1959-12-01
•
Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Charles B Criner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:34
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/006; C22C21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A WROUGHT ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM 3 TO 9% COPPER, 0.15 TO 1.0% MANGANESE, 0.02 TO 0.5% CADMIUM, 0.2 TO 3% LITHIUM AND 0.05 TO 2.0% MAGNESIUM, SAID ALLOY WHEN SOLUTION HEATED TREATED AT 920 TO 980*F. AND AGE AT 275 TO 350* F. BEING CHARACTERIZED BY A HIGHER TENSILE AND YIELD STRENGTH AT 300 TO 400*F. THAN THE SAME ALLOY DEVOID OF CADMIUM, LITHIUM AND MAGNESIUM.
Claim 2
Dependent Claim
70 words
A WROUGHT ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM 3 TO 9% COPPER, 0.15 TO 1.0% MANGANESE, 0.02 TO 0.5% CADMIUM, 0.2 TO 3% LITHIUM AND 0.05 TO 2.0% MAGNESIUM, SAID ALLOY WHEN SOLUTION HEATED TREATED AT 920 TO 980*F. AND AGE AT 275 TO 350* F. BEING CHARACTERIZED BY A HIGHER TENSILE AND YIELD STRENGTH AT 300 TO 400*F. THAN THE SAME ALLOY DEVOID OF CADMIUM, LITHIUM AND 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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |