US2880060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of niobium and tantalum values
Assignee: Horizons Inc
•
Filing: 1957-02-28
•
Granted: 1959-03-31
•
Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Neva L Campbell
- 👤 Ronald C Vickery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
C; C01; C01G; C01G33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A PROCESS FOR THE TREATMENT OF OXIDIC MATERIALS CONTAINING OXIDES OF BOTH TANTALUM AND NIOBIUM FOR OBTAINING A SEPARATION OF THE NIOBIUM VALUES FROM THE TANTALUM VALUES WHICH COMPRISES: FORMING A DRY MIXTURE OF THE PRIMARY MATERIAL CONTAINING OXIDES OF BOTH TANTALUM AND NIOBIUM WITH A FLUORIDE OF THE GROUP CONSISTING OF THE ALKALI METAL BIFLUORIDES AND AMMONIUM BIFLUORIDE, MIXTURES OF SAID BIFLUORIDES, AND MIXTURES OF AT LEAST ONE OF SAID BIFLUORIDES WITH ALKALI METAL NORMAL FLUORIDES; HEAT ING THE MIXTURE TO A TEMPERATURE AT LEAST SUFFICIENT TO MELT A BIFLUORIDE IN THE MIXTURE AND TO CONVERT THE NIOBIUM VALUES TO A WATER-SOLUBLE COMPLEX FLUORIDE AND THE TANTALUM VALUES TO A COMPLEX FLUORIDE HAVING A SOLUBILITY IN WATER WHICH IS LESS THAN THE SOLUBILITY OF THE COMPLEX FLUORIDE OF NIOBIUM IN WATER AND SEPARTING THE TWO FLUORIDES BY EXTRACTION WITH AN AQUEOUS MEDIUM.
Claim 2
Dependent Claim
143 words
A PROCESS FOR THE TREATMENT OF OXIDIC MATERIALS CONTAINING OXIDES OF BOTH TANTALUM AND NIOBIUM FOR OBTAINING A SEPARATION OF THE NIOBIUM VALUES FROM THE TANTALUM VALUES WHICH COMPRISES: FORMING A DRY MIXTURE OF THE PRIMARY MATERIAL CONTAINING OXIDES OF BOTH TANTALUM AND NIOBIUM WITH A FLUORIDE OF THE GROUP CONSISTING OF THE ALKALI METAL BIFLUORIDES AND AMMONIUM BIFLUORIDE, MIXTURES OF SAID BIFLUORIDES, AND MIXTURES OF AT LEAST ONE OF SAID BIFLUORIDES WITH ALKALI METAL NORMAL FLUORIDES; HEAT ING THE MIXTURE TO A TEMPERATURE AT LEAST SUFFICIENT TO MELT A BIFLUORIDE IN THE MIXTURE AND TO CONVERT THE NIOBIUM VALUES TO A WATER-SOLUBLE COMPLEX FLUORIDE AND THE TANTALUM VALUES TO A COMPLEX FLUORIDE HAVING A SOLUBILITY IN WATER WHICH IS LESS THAN THE SOLUBILITY OF THE COMPLEX FLUORIDE OF NIOBIUM IN WATER AND SEPARTING THE TWO FLUORIDES BY EXTRACTION WITH AN AQUEOUS MEDIUM.
References Cited (Backward Citations)
US2859098A
Cited
US2859099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |