US3784593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for class iv-b metals ore reduction (improvement)
Assignee: Individual
•
Filing: 1972-03-22
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Granted: 1974-01-08
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Expires: 1992-03-22
Abstract
Abstract ORES CONTAINING OXIDES OF TITANIUM, ZIRCONIUM, AND HAFMIUM ARE REDUCED BY MIXING THEM WITH A SOLUTION CONTAINING PRIMARILY PHOSPHORIC ACID AS WELL AS ZINC OXIDE AND A SULFATED SURFACTANT. CALCIUM CARBONATE IS ADDED TO THE SOLUTION AND IT IS BROUGHT TO A BOIL, ALLOWING THE VOLATILE MATERIALS TO VAPORIZE TO FORM A SYRUPY MIXTURE. OPTIONALLY, SODIUM BICARBONATE AND WATER ARE ADDED AND THE RESULTANT MIXTURE IS DECANTED. THE RESULTING MATERIAL IS LEACHED AND DRIED. THE RESIDUE IS IMMERSED IN MOLTEN SODIUM HYDROXIDE, DILUTED WITH WATER, RINSED, RE-DRIED, AND SMELTED TO YIELD THE PURE METAL.
Inventors
- 👤 P Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1295; C22B34/1236; C22B34/124; C22B34/1259; C22B34/14
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |