US3732128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatments of die castings under pressure
Assignee: Farley Inc
•
Filing: 1971-07-16
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Granted: 1973-05-08
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Expires: 1991-07-16
Abstract
Abstract METALLIC DIE CASTINGS OF MAGNESIUM, ALUMINUM AND ALLOYS THEREOF ARE SUBJECTED TO A HEAT TREATMENT OF FROM 300* TO 600*C. UNDER A PRESSURE OF FROM 100 TO 10,000 P.S.I. FOLLOWED BY A LOW TEMPERATURE AGING TREATMENT TO IMPROVE THE PROPERTIES OF THE METALS WITHOUT FORMING BLISTERS ON THE DIE CAST PRODUCT.
Inventors
- 👤 C Statham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:57
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49972
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |