US3646175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for converting miscellaneous pieces of reactive metals to a usable form
Assignee: RMI Co
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Filing: 1970-09-21
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Granted: 1972-02-29
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Expires: 1990-09-21
Abstract
Abstract PIECES OF A REACTIVE METAL, SUCH AS TITANIUM OR ZIRCONIUM, ARE MELTED ON A HEARTH WITHIN A CHAMBER WHICH IS EVACUATED OF FILLED WITH INERT GAS. STREAM OF MOLTEN METAL OVERFLOWS THE HEARTH AND IS ACTED ON BY A MECHANISM WHICH DISPERSES IT INTO SMALL PARTICLES. THE PARTICLES SOLIDIFY AS PELLETS AND/OR FLAKES WHICH ARE READILY BLENDED WITH SPONGE METAL AND USED IN MAKING UP A MELTING CHARGE. DENSE INCLUSIONS IN THE STARTING MATERIAL SINK TO THE BOTTOM OF THE HEARTH AND THUS ARE ELIMINATED FROM THE PRODUCT.
Inventors
- 👤 Howard B Bomberger Jr
- 👤 Harold D Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:29
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10; C; C21; C21C; C21C7/00; C21C7/10; B22F2009/0804; B22F2009/0808; B22F9/082; B22F2009/0848; B22F2009/0856
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |