US3304209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum base alloy
Assignee: Alcoa Corp
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Filing: 1966-02-03
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Granted: 1967-02-14
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 William A Anderson
- 👤 William D Vernam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A COPPER-FREE ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, 3.5 TO 8% ZINC, 0.75 TO 4.3% MAGNESIUM, WHEREIN THE ZINC CONTENT ALWAYS EXCEEDS THE MAGNESIUM CONTENT, 0.05 TO 0.75% MANGANESE, 0.06 TO 0.30% CHROMIUM, 0.06 TO 0.30% ZIRCONIUM AND 0.01 TO 0.15% TITANIUM, THE IRON IMPURITY NOT EXCEEDING 0.4% AND THE SILICON IMPURITY NOT EXCEEDING 0.35%, SAID MANGANESE, CHROMIUM, ZIRCONIUM AND TITANIUM BEING EMPLOYED IN AMOUNTS WITHIN THE FOREGOING RANGES SUCH THAT THE SUM OF PERCENT CHROMIUM + PERCENT ZIRCONIUM + 1.23 X PERCENT TITANIUM + 0.19 X PERCENT MANGANESE DOES NOT EXCEED 0.6%, SAID ALLOY BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM SEGREGATION OF SAID MANGANESE, CHROMIUM, ZIRCONIUM AND TITANIUM COMPONENTS.
Claim 2
Dependent Claim
111 words
A COPPER-FREE ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, 3.5 TO 8% ZINC, 0.75 TO 4.3% MAGNESIUM, WHEREIN THE ZINC CONTENT ALWAYS EXCEEDS THE MAGNESIUM CONTENT, 0.05 TO 0.75% MANGANESE, 0.06 TO 0.30% CHROMIUM, 0.06 TO 0.30% ZIRCONIUM AND 0.01 TO 0.15% TITANIUM, THE IRON IMPURITY NOT EXCEEDING 0.4% AND THE SILICON IMPURITY NOT EXCEEDING 0.35%, SAID MANGANESE, CHROMIUM, ZIRCONIUM AND TITANIUM BEING EMPLOYED IN AMOUNTS WITHIN THE FOREGOING RANGES SUCH THAT THE SUM OF PERCENT CHROMIUM + PERCENT ZIRCONIUM + 1.23 X PERCENT TITANIUM + 0.19 X PERCENT MANGANESE DOES NOT EXCEED 0.6%, SAID ALLOY BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM SEGREGATION OF SAID MANGANESE, CHROMIUM, ZIRCONIUM AND TITANIUM COMPONENTS.
References Cited (Backward Citations)
US2106827A
Cited
US2146330A
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FR932575A
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GB656476A
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US2985530A
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US2993783A
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US3133839A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |