Patent JPS55145451A successfully refreshed from Google Patents.
Patent US2813023A successfully refreshed from Google Patents.
US2813023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a magnesium-base alloy containing aluminum and zinc
Assignee: Dow Chemical Co
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Filing: 1955-08-11
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Granted: 1957-11-12
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Expires: 1975-08-11
Abstract
No abstract record available.
Inventors
- 👤 James P Fiynn
- 👤 William P Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:58
CPC Classifications
C; C22; C22C; C22C23/00; C22C23/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING A FINE HOMOGENEOUS GRAIN MAGNESIUM-BASE ALLOY INGOT CONTAINING ALUMINUM IN AMOUNT BETWEEN 2.5 AND 3.5 PERCENT AND ZINC BETWEEN 0.75 AND 1.5 PERCENT BY WEIGHT WHICH COMPRISES DISPERSING IN THE FIRST BATCH OF MOLTEN MAGNESIUM AN AMOUNT OF ZIRCONIUM EQUAL TO BETWEEN 0.3 AND 0.6 PERCENT OF THE WEIGHT OF THE MAGNESIUM FOLLOWED BY DISPERSING IN THE RESULTING MELT AN AMOUNT OF ALUMINUM EQUAL TO FROM ABOUT 3 TO 5 PERCENT OF THE WEIGHT OF THE ZIRCONIUM ADDED TO THE MELT, SETTLING THE SO-TREATED MELT, ALLOYING FROM 5 TO 7 PERCENT OF ALUMINUM AND 0.75 TO 1.5 PERCENT OF ZINC BY WEIGHT WITH A SECOND BATCH OF MOLTEN MAGNESIUM, BLENDING TOGETHER SUBSTANTIALLY EQUAL WEIGHTS OF SUPERNATANT PORTIONS OF BATCHES 1 AND 2, AND THEREAFTER CASTING THE SO-TREATED BLEND INTO INGOT.
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING A FINE HOMOGENEOUS GRAIN MAGNESIUM-BASE ALLOY INGOT CONTAINING ALUMINUM IN AMOUNT BETWEEN 2.5 AND 3.5 PERCENT AND ZINC BETWEEN 0.75 AND 1.5 PERCENT BY WEIGHT WHICH COMPRISES DISPERSING IN THE FIRST BATCH OF MOLTEN MAGNESIUM AN AMOUNT OF ZIRCONIUM EQUAL TO BETWEEN 0.3 AND 0.6 PERCENT OF THE WEIGHT OF THE MAGNESIUM FOLLOWED BY DISPERSING IN THE RESULTING MELT AN AMOUNT OF ALUMINUM EQUAL TO FROM ABOUT 3 TO 5 PERCENT OF THE WEIGHT OF THE ZIRCONIUM ADDED TO THE MELT, SETTLING THE SO-TREATED MELT, ALLOYING FROM 5 TO 7 PERCENT OF ALUMINUM AND 0.75 TO 1.5 PERCENT OF ZINC BY WEIGHT WITH A SECOND BATCH OF MOLTEN MAGNESIUM, BLENDING TOGETHER SUBSTANTIALLY EQUAL WEIGHTS OF SUPERNATANT PORTIONS OF BATCHES 1 AND 2, AND THEREAFTER CASTING THE SO-TREATED BLEND INTO INGOT.
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |