Patent US3674448A successfully refreshed from Google Patents.
US3674448A
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Anodic aluminum material and articles and composite articles comprising the material
Assignee: Alcoa Corp
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Filing: 1969-04-21
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Granted: 1972-07-04
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Expires: 1989-04-21
Abstract
Abstract AN ARTICLE COMPRISING AN ANODE MATERIAL COMPOSED OF A SOLUTION HEAT TREATABLE AND PRECIPITATION HARDENABLE ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF 2 TO 8% ZINC, 0.5 TO 2% MAGNESIUM, 0.3 TO 2% SILICON, THE SILICON CONTENT AMOUNTING TO AT LEAST 0.45 TIMES THE MAGNESIUM CONTENT, THE BALANCE BEING ALUMINUM AND INCIDENTAL ELEMENTS AND A MAXIMUM OF 0.25% COPPER AND A MAXIMUM OF 0.25% CHROMIUM, AS IMPURITIES, THE MEMBER EXHIBITING A STABLE SOLUTION POTENTIAL UPON EXPOSURE TO VARYING THERMAL CONDITIONS. ALSO CONTEMPLATED IS A COMPOSITE HAVING A CLADDING COMPOSED OF THE MATERIAL AND A HEAT TREATABLE ALUMINUM ALLOY CORE.
Inventors
- 👤 Robert H Brown
- 👤 William A Anderson
- 👤 William King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:36
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/10; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/12; C23F13/14; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |