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US2540366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of magnesium castings
Assignee: Alcoa Corp
•
Filing: 1945-03-07
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Granted: 1951-02-06
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Expires: 1965-03-07
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Gantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:57
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF REFINING THE GRAIN SIZE OF MAGNESIUM AND MAGNESIUM BASE ALLOY CASTINGS AND MATERIALLY REDUCING THE NON-METALLIC IMPURITY CONTENT THEREOF INVOLVING MELTING THE METAL INTRODUCING INTO THE MELT 0.01 TO 0.3 PERCENT BY WEIGHT OF AT LEAST ONE HALOGENATED HYDROCARBON COMPOUND WHICH IS SOLID AT ROOM TEMPERATURE AND THEREAFTER CASTING THE METAL.
Claim 2
Independent Claim
54 words
A METHOD OF REFINING THE GRAIN SIZE OF MAGNESIUM AND MAGNESIUM BASE ALLOY CASTINGS AND MATERIALLY REDUCING THE NON-METALLIC IMPURITY CONTENT THEREOF INVOLVING MELTING THE METAL INTRODUCING INTO THE MELT 0.01 TO 0.3 PERCENT BY WEIGHT OF AT LEAST ONE HALOGENATED HYDROCARBON COMPOUND WHICH IS SOLID AT ROOM TEMPERATURE AND THEREAFTER CASTING THE METAL.
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) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |