Patent US2849311A successfully refreshed from Google Patents.
US2849311A
Expired / Lapsed
US
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Method of making magnesium-zirconium master alloy
Assignee: Alcoa Corp
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Filing: 1952-01-22
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Granted: 1958-08-26
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Expires: 1972-01-22
Abstract
No abstract record available.
Inventors
- 👤 William C Newhams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:46
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C1/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD OF MAKING A SUBSTANTIALLY CHLORIDE-FREE MASTER ALLOY CONTAINING MAGENSIUM AND ZIRCONIUM COMPRISING PROVIDING A BODY OF MOLTEN MAGNESIC METAL, ADDING ZIRCONIUM CHLORIDE THERETO WHILE MAINTAINING SAID BODY IN A MOLTEN CONDITION, MIXING SAID CHLORIDE WITH SAID MOLTEN METAL WHEREBY THE REACTION BETWEEN THE MOLTEN METAL WHEREBY THE REACTION BETWEEN THE MOLPLETED AND A MAXIMUM AMOUNT OF ZIRCONIUM IS INTRODUCED INTO THE MOLTEN METAL, TERMINATING SAID MIXING, ALLOWING THE MIXTURE TO STAND AND TO GRAVITATIONALLY SEPARATE INTO METALLIC AND NON-METALLIC LAYERS WITHOUT SUBSTANTIAL CHANGE IN TEMPERATURE WITH RESPECT TOS THAT PREVAILING DURING THE PERIOD OF ADDING AND MIXING THE ZIRCONIUM CHLORIDE, LOWERING THE TEMPERATURE OF THE LAYERED MASS TO A LEVEL WHERE AT LEAST SOME OF THE MOLTEN METAL SOLIDIFIES, REMOVING SUBSTANTIALLY THE ENTIRE NON-METALLIC LAYER, REHEATING THE REMAINING METALLIC PORTION AT LEAST TO A TEMPERATURE AT WHICH THE PREVIOUSLY FROZEN MAGNESIC METAL AGAIN MELTS AND THEREAFTER REMOVING ANY LIQUID ALLOY.
Claim 2
Independent Claim
152 words
THE METHOD OF MAKING A SUBSTANTIALLY CHLORIDE-FREE MASTER ALLOY CONTAINING MAGENSIUM AND ZIRCONIUM COMPRISING PROVIDING A BODY OF MOLTEN MAGNESIC METAL, ADDING ZIRCONIUM CHLORIDE THERETO WHILE MAINTAINING SAID BODY IN A MOLTEN CONDITION, MIXING SAID CHLORIDE WITH SAID MOLTEN METAL WHEREBY THE REACTION BETWEEN THE MOLTEN METAL WHEREBY THE REACTION BETWEEN THE MOLPLETED AND A MAXIMUM AMOUNT OF ZIRCONIUM IS INTRODUCED INTO THE MOLTEN METAL, TERMINATING SAID MIXING, ALLOWING THE MIXTURE TO STAND AND TO GRAVITATIONALLY SEPARATE INTO METALLIC AND NON-METALLIC LAYERS WITHOUT SUBSTANTIAL CHANGE IN TEMPERATURE WITH RESPECT TOS THAT PREVAILING DURING THE PERIOD OF ADDING AND MIXING THE ZIRCONIUM CHLORIDE, LOWERING THE TEMPERATURE OF THE LAYERED MASS TO A LEVEL WHERE AT LEAST SOME OF THE MOLTEN METAL SOLIDIFIES, REMOVING SUBSTANTIALLY THE ENTIRE NON-METALLIC LAYER, REHEATING THE REMAINING METALLIC PORTION AT LEAST TO A TEMPERATURE AT WHICH THE PREVIOUSLY FROZEN MAGNESIC METAL AGAIN MELTS AND THEREAFTER REMOVING ANY LIQUID ALLOY.
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US2286311A
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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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |