Patent US2549955A successfully refreshed from Google Patents.
US2549955A
Expired / Lapsed
US
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Magnesium base alloys
Assignee: Magnesium Elektron Ltd
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Filing: 1949-01-04
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Granted: 1951-04-24
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Expires: 1969-01-04
Abstract
No abstract record available.
Inventors
- 👤 Jessup Alfred Claude
- 👤 Emley Edward Frederick
- 👤 Fisher Philip Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:13
CPC Classifications
C; C22; C22C; C22C23/00; C22C23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A MAGNESIUM BASE ALLOY, CONSISTING ESSENTIALLY OF AT LEAST 85% MAGNESIUM AND AT LEAST 0.4% OF ZIRCONIUM AND FROM 0.5% TO 4% OF RARE EARTH METALS OF WHICH NEODYMIUM CONSTITUTES AT LEAST 50%, AND IN WHICH LANTHANUM AND CERIUM DO NOT EXCEED 25% TOGETHER, THE BALANCE OF THE RARE EARTH METALS BEING PRASEODYMIUM AND SMALL QUANTITIES OF SAMARIUM AND TRACES OF ELEMENTS OF THE YTTRIUM SUB-GROUP OF RARE EARTH METALS.
Claim 2
Dependent Claim
70 words
A MAGNESIUM BASE ALLOY, CONSISTING ESSENTIALLY OF AT LEAST 85% MAGNESIUM AND AT LEAST 0.4% OF ZIRCONIUM AND FROM 0.5% TO 4% OF RARE EARTH METALS OF WHICH NEODYMIUM CONSTITUTES AT LEAST 50%, AND IN WHICH LANTHANUM AND CERIUM DO NOT EXCEED 25% TOGETHER, THE BALANCE OF THE RARE EARTH METALS BEING PRASEODYMIUM AND SMALL QUANTITIES OF SAMARIUM AND TRACES OF ELEMENTS OF THE YTTRIUM SUB-GROUP OF RARE EARTH METALS.
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |