US3826688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy system
Assignee: Reynolds Metals Co
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Filing: 1972-08-03
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Granted: 1974-07-30
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Expires: 1992-08-03
Abstract
Abstract WROUGHT ARTICLES OF AL-CU-MG ALLOY CONTAINING UP TO ABOUT 5% COPPER AND UP TO ABOUT 2% MAGNESIUM AS THE PRINCIPAL ALLOYING ELEMENTS BY WEIGHT, WITHIN LIMITS EFFECTIVE TO ACHIEVE SUBSTANTIALLY SINGLE PHASE STRUCTURE, AND EXHIBITING IMPROVED FRACTURE TOUGHNESS IN T8XX CONDITION; ALSO, RELATED PRACTICES AND IMPROVED ALLOY COMPOSITIONS FOR MAKING SUCH ARTICLES, INCLUDING PLATE.
Inventors
- 👤 S Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:03
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |