US3307978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing high strength fabricated articles from aluminum-base alloys containing copper
Assignee: Dow Chemical Co
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Filing: 1964-02-17
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Granted: 1967-03-07
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Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 George S Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:54
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/08; C22C; C22C21/00; C22C21/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A METHOD OF PREPARING A HIGH STRENGTH ALUMINUMBASE ALLOY EXTRUDED ARTICLE CONSISTING BY WEIGHT ESSENTIALLY OF AN AMOUNT OF COPPER WITHIN THE RANGE OF FROM ABOUT 9.5 TO ABOUT 16 PERCENT, THE BALANCE BEING ALUMINUM, WHICH COMPRISES THE STEPS OF ATOMIZING THE ALLOY INTO PELLETS FROM THE MOLTEN STATE, EXTRUDING THE PELLETED ALLOY AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 750* TO ABOUT 850*F., SOLUTION HEAT TREATNG THE ALLOY AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 960* TO ABOUT 990*F. FOR A PERIOD OF TIME WITHIN THE RANGE OF FROM ABOUT 5 SECONDS TO ABOUT 2 HOURS, AND AGING THE SO-TREATED ALLOY AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 320* TO ABOUT 340*F. FOR A PERIOD WITHIN THE RANGE OF FROM ABOUT 10 TO ABOUT 20 HOURS.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |