US3761252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum base alloy
Assignee: Materion Brush Inc
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Filing: 1972-10-13
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Granted: 1973-09-25
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Expires: 1992-10-13
Abstract
Abstract THERE IS PROVIDED AN ALUMINUM BASE ALLOY CHARACTERIZED BY A SUBSTANTIAL AMOUNT OF SILICON AND ZINC TOGETHER WITH COPPER AND MINOR AMOUNTS OF MAGNESIUM, BERYLLIUM, TITANIUM, AND IMPURITIES. THIS ALLOY IS USEFUL IN MAKING MOLDS WHERE HARDNESS AND REPLICATION OF FINE DETAIL IS REQUIRED. LATENT WITHIN THE AS-CAST ALLOY ARE DEVELOPABLE HARDNESS, FINE GRAIN STRUCTURE, AND FREEDOM FROM MICROPOROSITY OBTAINED BY SUBMITTING THE AS-CAST ALLOY TO A FURTHER THERMAL HISTORY.
Inventors
- 👤 Rourke R O
- 👤 W Shrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:07
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |