US3762962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution heat treatment of hardenable aluminium alloys
Assignee: ABB Norden Holding AB
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Filing: 1972-03-09
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Granted: 1973-10-02
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Expires: 1992-03-09
Abstract
Abstract A billet, formed of a hardenable aluminium alloy containing substantial amounts of undissolved constituents other than aluminium and which has not been solution-heat treated, is hydrostatically extruded through a die at such a rate that, considering the reduction in cross-section and the rate of extrusion, the extruded product attains a temperature greater than the dissolving temperature of the constituents. The temperature of the extruded product is kept at substantially the dissolving temperature for a time sufficient to product dissolution and is thereafter rapidly cooled.
Inventors
- 👤 J Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:51
CPC Classifications
B; B21; B21C; B21C29/00; B21C23/00; B21C23/007; C; C22; C22F; C22F1/00; C22F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
Method as claimed in claim 1, which comprises heating the billet before extrusion to a temperature of 100* to 300*C.
Claim 2
Dependent Claim
24 words
Method as claimed in claim 1, which comprises storing the extruded product in substantial batches while maintaining the dissolving temperature and cooling the batches.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |