US3833697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for consolidation and extrusion of fiber-reinforced composites
Assignee: Melpar Inc
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Filing: 1969-02-14
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Granted: 1974-09-03
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Expires: 1989-02-14
Abstract
Abstract A FIBER-REINFORCED METAL COMPOSITE OF DESIRED SHAPE IS PREDUCED BY CONSOLIDATING A MIXTURE OF THE METAL MATRIXAND THE FIBERS UNDER PRESSRE IT THE MIXTURE MAINTAINED AT A TEMPERATURE ABOVE THE SOLIDUS OF THE MATRIX SYSTEM. FOLLOWING THE DESIRED CONSOLIDATION, THE COMPOSITE IS EXTRUDED BY LOWERING ITS TEMPERATURE TO A VALUE IN THE RANGE FROM 90% TO 98% OF THE MELTING POINT OF THE MATRIX, AND INCREASING THE PRESSURE TO A VALUE EXCEEDING THE CONSOLIDATION PRESSURE. TO PERMIT EXTRUSION OF THE JUST CONSOLIDATED BODY, THE PRESS IN WHICH CONSOLIDATION IS PERFORMED CONTAINS A DIE CAVITY PLUGGED BY AN EXTRUDABLE SEAL.
Inventors
- 👤 P Lare
- 👤 A Divecha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:39
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/14
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |