Method of making beryllium-aluminum-copper-silicon wrought material
Abstract
Abstract A METHOD OF PRODUCING WROUGHT MATERIAL CONTAINING BERYLLIUM AND ALUMINUM AND AT LEAST ONE ELEMENT SELECTED FROM COPPER, SILICON, ZINC AND NICKEL COMPRISING: FORMING A CASTING OF SAID MATERIAL IN A MOLD HAVING HIGH THERMAL CONDUCTIVITY MATERIAL; APPLYING A PROTECTIVE METALLIC COATING TO SAID CASTING; HEATING THE COATED CASTING AT A TEMPERATURE OF 600 TO 950*F. FOR A PERIOD OF 5 TO 100 HOURS; EXTRUDING THE HEATED CASTING AT A RATE OF ABOUT 13 TO 60 INCHES PER MINUTE; REMOVING THE JACKET FROM THE EXTRUDED CASTING; HEATING THE EXTRUSION AT A TEMPERATURE OF 900 TO 975*F. FOR A PERIOD OF TIME OF 12 HOURS TO 1 WEEK; AND ROLLING THE HEATED EXTRUSION AT A TOTAL REDUCTION OF 10 TO 98%.
Inventors
- 👤 Richard H Krock
- 👤 William J Richmond
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |