Patent US3661657A successfully refreshed from Google Patents.
US3661657A
Expired / Lapsed
US
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Method for making aluminum sheet
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1970-12-07
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Granted: 1972-05-09
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Expires: 1990-12-07
Abstract
Abstract A method for forming aluminum sheet material containing 0.5-3.8 percent magnesium, having little or no propensity for forming ripples when subsequently plastically stretched during fabrication said method comprising hot rolling, intermediate annealing to effect substantially complete recrystallization and subsequently cold rolling to final gauge thickness and the product formed thereby.
Inventors
- 👤 Winston A Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:56
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/047; Y; Y10; Y10S; Y10S148/00; Y10S148/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
The aluminum-magnesium sheet of claim 1 wherein said sheet has a composition containing 2.0 to 3.6 percent magnesium.
Claim 2
Dependent Claim
22 words
The aluminum-magnesium sheet of claim 1 further characterized by a micro structure containing between about 5 and 30 percent cube texture component.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |