US3291656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Castings of magnesium-aluminum-zinc alloys
Assignee: Otto Fuchs KG
•
Filing: 1963-11-07
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Granted: 1966-12-13
•
Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Mann Karl Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:18
CPC Classifications
C; C22; C22C; C22C23/00; C22C23/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
IN THE METHOD OF PREPARING HEAT TREATED CASTINGS OF A MAGNESIUM ALLOY OF THE TYPE MGAIZN WHICH METHOD INCLUDES A SOLUTION HEAT TREATMENT ABOUT FROM 308*C. TO BELOW 415*C., QUENCHING, AND ARTIFICALLY AGING, THE IMPROVEMENT WHICH COMPRISES SELECTING AN ALLOY SUBSTANTIALLY CONSISTING BY WEIGHT OF 8.3 TO 8.7% ALUMINUM, 1.4 TO 1.6% ZINC, 0 TO 0.3% MANGANESE, 0 TO 0.7% COPPER AND THE BALANCE MAGNESIUM AND SUBJECTING THE SAME AFTER SAID SOLUTION HEAT TREATMENT BELOW 415*C. AND PRIOR TO QUENCHING TO A FURTHER SSOLUTION HEAT TREATMENT AT A TEMPERATURE OF THE ORDER OF ABOUT 415*C. TO 425*C. FOR A TIME SUFFICIENT TO OBTAIN FOR THE FINISHED CASTINGS SUBSTANTIALLY THE FOLLOWING ORDER OF MAGNITUDE MINIMUM STRENGTH VALUES:
References Cited (Backward Citations)
US2413928A
Cited
US2477503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |