US2686946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining beryllium in the presence of a flux
Assignee: United States Atomic Energy Commission
•
Filing: 1947-08-15
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Granted: 1954-08-24
•
Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
- 👤 Jackson John Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:31
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/10; C22C; C22C25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF PRODUCING BERYLLIUM CASTINGS WHICH COMPRISES MELTING BERYLLIUM IN THE PRESENCE OF AN INERT ATMOSPHERE, ADMIXING WITH THE BERYLLIUM MELT A MOLTEN REFINING FLUX COMPOSITION CONTAINING 45-65% OF BERYLLIUM FLUORIDE, ABOUT 7-20% OF BARIUM FLOURIDE, ABOUT 7-20% OF CALCIUM FLOURIDE, AND ABOUT 7-20% OF LITHIUM FLOURIDE AT A TEMPERATURE OF ABOUT 2300* F., AND THEN CASTING THE MOLTEN BERYLLIUM METAL AT A TEMPERATURE IN EXCESS OF THE MELTING POINT OF BERYLLIUM METAL.
Claim 2
Independent Claim
74 words
A METHOD OF PRODUCING BERYLLIUM CASTINGS WHICH COMPRISES MELTING BERYLLIUM IN THE PRESENCE OF AN INERT ATMOSPHERE, ADMIXING WITH THE BERYLLIUM MELT A MOLTEN REFINING FLUX COMPOSITION CONTAINING 45-65% OF BERYLLIUM FLUORIDE, ABOUT 7-20% OF BARIUM FLOURIDE, ABOUT 7-20% OF CALCIUM FLOURIDE, AND ABOUT 7-20% OF LITHIUM FLOURIDE AT A TEMPERATURE OF ABOUT 2300* F., AND THEN CASTING THE MOLTEN BERYLLIUM METAL AT A TEMPERATURE IN EXCESS OF THE MELTING POINT OF BERYLLIUM METAL.
References Cited (Backward Citations)
US394742A
Cited
US1511829A
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US1775589A
Cited
US1673043A
Cited
US2052278A
Cited
US2148664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |