Patent US1713675A successfully refreshed from Google Patents.
Patent US3559271A successfully refreshed from Google Patents.
US3559271A
Expired / Lapsed
US
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Hydrostatic extrusion of powder
Assignee: ABB Norden Holding AB
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Filing: 1968-06-24
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Granted: 1971-02-02
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Expires: 1988-06-24
Abstract
Abstract RODS OR WIRE ARE PRODUCED FROM POWDER BY FORMING A BILLET COMPACTED TO GREAT DENSITY AND PROVIDED ON ITS SURFACE WITH A TEMPORARY, LIQUID-TIGHT BARRIER OF NONMETALLIC YIELDING MATERIAL. THE BILLET IS ENCLOSED IN A PRESSURE CHAMBER LOCATED ABOVE A DIE, WITHIN WHICH CHAMBER A LIQUID CAN BE COMPRESSED. THE COLD BILLET IS FORMED BY HYDROSTATIC EXTRUSION TO A CROSS SECTION DETERMINED BY THE NOZZLE OF THE DIE AFTER WHICH THE TEMPORARY BARRIER IS REMOVED. THE DEFORMATION IS CARRIED OUT UNDER SUCH PRESSURE AS TO PRODUCE A SUFFICIENT INCREASE IN TEMPERATURE TO SINTER THE POWDER.
Inventors
- 👤 Jan Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:54
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/007; B22; B22F; B22F3/00; B22F3/20; B22F2003/202; B22F2003/206
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |