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US3720508A
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US
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Aluminum alloy
Assignee: Olin Corp
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Filing: 1971-06-01
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Granted: 1973-03-13
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Expires: 1991-06-01
Abstract
Abstract This disclosure teaches a novel aluminum alloy having high resistance to oxidation during hot rolling, improved surface appearance and improved bright anodizing characteristics and the method of processing same. The alloy contains from 0.5 to 3 percent magnesium, from 0.02 to 0.5 percent silver, from 0.001 to 0.2 percent iron, from 0.001 to 0.15 percent silicon, balance essentially aluminum, wherein the silver is substantially dissolved in solid solution in the matrix.
Inventors
- 👤 A Brock
- 👤 M Pryor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:07
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
An aluminum alloy having improved oxidation resistance at high temperature consisting essentially of 0.5 to 3 percent magnesium, 0.02 percent to 0.5 percent silver, from 0.001 to 0.2 percent iron, from 0.001 to 0.15 percent silicon, up to 0.10 percent copper, up to 0.10 percent manganese, up to 0.10 percent zinc, up to 0.05 percent chromium, up to 0.05 percent titanium, balance essentially aluminum, wherein the silver is substantially dissolved in solid solution in the matrix.
Claim 2
Dependent Claim
76 words
An aluminum alloy having improved oxidation resistance at high temperature consisting essentially of 0.5 to 3 percent magnesium, 0.02 percent to 0.5 percent silver, from 0.001 to 0.2 percent iron, from 0.001 to 0.15 percent silicon, up to 0.10 percent copper, up to 0.10 percent manganese, up to 0.10 percent zinc, up to 0.05 percent chromium, up to 0.05 percent titanium, balance essentially aluminum, wherein the silver is substantially dissolved in solid solution in the matrix.
Claim 3
Dependent Claim
16 words
An alloy according to claim 1 wherein the magnesium content is from 0.8 to 2.8 percent.
References Cited (Backward Citations)
US2586647A
Cited
US3306717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |