Patent US5200624A successfully refreshed from Google Patents.
US2826518A
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Aluminum base alloy article
Assignee: Alcoa Corp
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Filing: 1953-07-09
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Granted: 1958-03-11
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Expires: 1973-07-09
Abstract
No abstract record available.
Inventors
- 👤 William A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:50
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN ALUMINUM BASE ALLOY ARTICLE WHICH HAS RECIEVED AT LEAST 20% COLD WORK, SAID ALLOY CONSISTING OF 0.005 TO 0.25% BERYLLIUM, A MAXIMUM OF 0.05% EACH OF COPPER AND MAGNESIUM IMPURITIES, AT LEAST 0.01% EACH OF IRON AN SILICON, THE TOTAL QUANTITY OF IRON AND SILICON NOT EXCEEDING 0.8% AND THE AMOUNT OF IRON NOT EXCEEDING 4/3 OF THE SILICON CONTENT, ANS THE BALANCE ALUMINUM EXCEPT FOR OTHER IMPURITIES THAN THOSE NAMED HEREINBEFORE, SAID COLD WORKED ALLOY ARTICLE BEING CHARACTERIZED BY A LOWER TEMPERATURE OF RECRYSTALLIZATION WHEN ANNEALED THAN ALUMINUM CONTAINING ONLY IMPURITIES INCLUDING NOT LESS THAN 0.01% EACH OF IRON AND SILICON AND NOT MORE THAN A TOTAL OF 0.8% OF IRON AND SILICON BUT THE RATIO OF SAID IRON TO SILICON EXCEEDING 4 TO 3 WHERE SAID ALUMINUM HAS RECIEVED THE SAME AMOUNT OF COLD WORK AS SAID COLD WORKED ARTICLE.
Claim 2
Dependent Claim
143 words
AN ALUMINUM BASE ALLOY ARTICLE WHICH HAS RECIEVED AT LEAST 20% COLD WORK, SAID ALLOY CONSISTING OF 0.005 TO 0.25% BERYLLIUM, A MAXIMUM OF 0.05% EACH OF COPPER AND MAGNESIUM IMPURITIES, AT LEAST 0.01% EACH OF IRON AN SILICON, THE TOTAL QUANTITY OF IRON AND SILICON NOT EXCEEDING 0.8% AND THE AMOUNT OF IRON NOT EXCEEDING 4/3 OF THE SILICON CONTENT, ANS THE BALANCE ALUMINUM EXCEPT FOR OTHER IMPURITIES THAN THOSE NAMED HEREINBEFORE, SAID COLD WORKED ALLOY ARTICLE BEING CHARACTERIZED BY A LOWER TEMPERATURE OF RECRYSTALLIZATION WHEN ANNEALED THAN ALUMINUM CONTAINING ONLY IMPURITIES INCLUDING NOT LESS THAN 0.01% EACH OF IRON AND SILICON AND NOT MORE THAN A TOTAL OF 0.8% OF IRON AND SILICON BUT THE RATIO OF SAID IRON TO SILICON EXCEEDING 4 TO 3 WHERE SAID ALUMINUM HAS RECIEVED THE SAME AMOUNT OF COLD WORK AS SAID COLD WORKED ARTICLE.
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) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |