Patent US2976143A successfully refreshed from Google Patents.
US2976143A
Expired / Lapsed
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Method of grain refinement of magnesium base alloys
Assignee: Dow Chemical Co
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Filing: 1959-01-26
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Granted: 1961-03-21
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Sturkey Lorenzo
- 👤 Virgil B Kurfman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:38
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C23/00; C22C23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF TREATING AN ALUMINUM-CONTAINING MAGNESIUM BASE ALLOY SO AS TO INSURE A GRAIN REFINED STRUCTURE BEING OBTAINED ON CASING A MELT THEREOF WHICH COMPRISES ADDING TO THE MELT AT A TEMPERATURE IN THE RANTE OF 1200 TO 1700*F. A PROPORTION OF AN INORGANIC CARBON-NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF CYANIDES, CYANATES, CYANAMIDES, FERROCYANIDES, FERRICYNAIDES AND THIOCYANATES, SAID PROPORTION OF INORGANIC CARBON-NITROGEN COMPOUND HAVING A CARBON CONTENT BY WEIGHT EQUIVALENT TO 0.01 TO 1 PERCENT OF THE WEIGHT OF THE MELT.
Claim 2
Independent Claim
84 words
THE METHOD OF TREATING AN ALUMINUM-CONTAINING MAGNESIUM BASE ALLOY SO AS TO INSURE A GRAIN REFINED STRUCTURE BEING OBTAINED ON CASING A MELT THEREOF WHICH COMPRISES ADDING TO THE MELT AT A TEMPERATURE IN THE RANTE OF 1200 TO 1700*F. A PROPORTION OF AN INORGANIC CARBON-NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF CYANIDES, CYANATES, CYANAMIDES, FERROCYANIDES, FERRICYNAIDES AND THIOCYANATES, SAID PROPORTION OF INORGANIC CARBON-NITROGEN COMPOUND HAVING A CARBON CONTENT BY WEIGHT EQUIVALENT TO 0.01 TO 1 PERCENT OF THE WEIGHT OF THE MELT.
References Cited (Backward Citations)
CA548673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |