US3653880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium cast alloys with little tendency to hot-crack
Assignee: Norsk Hydro ASA
•
Filing: 1970-01-08
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Granted: 1972-04-04
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Expires: 1990-01-08
Abstract
Abstract Magnesium cast alloys containing 3-10 percent aluminum, 0.3-2 percent zinc and 0.1-0.4 percent bismuth or tin, all by weight, showing little tendency to hot-crack.
Inventors
- 👤 Gunnar Gitlesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:15
CPC Classifications
C; C22; C22C; C22C23/00; C22C23/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
The alloy according to claim 1, containing bismuth, wherein the aluminum content is from 7.5 to 10 percent by weight.
Claim 2
Dependent Claim
20 words
The alloy according to claim 1, wherein the content of bismuth or tin is 0.2 to 0.3 percent by weight.
Claim 3
Dependent Claim
32 words
The alloy according to claim 4, containing up to 0.5 percent by weight of manganese, up to 0.5 percent by weight of silicon and up to 0.5 percent by weight of copper.
References Cited (Backward Citations)
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US2041866A
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US1975376A
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US2094332A
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US2000115A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |