US3057714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrometallurgical process for the separation of columbium and tantalum
Assignee: Kennecott Corp
•
Filing: 1959-08-20
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Granted: 1962-10-09
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Expires: 1979-08-20
Abstract
No abstract record available.
Inventors
- 👤 Alexander E Back
- 👤 Clifford E Selin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:19
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PYROMETALLURGICAL PROCESS FO R THE SEPARATION OF TANTALUM VALUES FROM COLUMBIUM VALUES IN A MINERAL MATERIAL CONTAINING SIGNIFICANT QUANTITITES OF BOTH ALONG WITH A SIGNIFICANT QUANTITY OF SLAG-FORMING MATERIAL, COMPRISING SMELTING SUCH MINERAL MATERIAL TOGETHER WITH SULFUR AND CARBON, AND WITH IRON IN SUFFICIENT AMOUNT IN SAID MATERIAL TO FORM A MATTE, THERE BEING SUFFICENT SULFUR TO SATISFY THE COLUMBIUM AND IRON STOICHIOMETRICALLY SO AS TO PRODUCE A MATTE PRODUCT IN WHICH THE RATIO OF COLUMBIUM TO TANTALUM IS CONSIDERABLY HIGHER THAN IN THE STARTING MATERIAL AND A SLAG IN WHICH THE RATIO OF TANTALUM OT COLUMBIUM IS CONSIDERABLY HIGHER THAN IN THE STARTING MATERIAL, THE SAID MATTE CONTAINING ESSENTIALLY ALL OF THE IRON; AND DRAWING OFF SAID MATTE PRODUCT SEPARATELY FROM SAID SLAG PRODUCT.
Claim 2
Dependent Claim
126 words
A PYROMETALLURGICAL PROCESS FO R THE SEPARATION OF TANTALUM VALUES FROM COLUMBIUM VALUES IN A MINERAL MATERIAL CONTAINING SIGNIFICANT QUANTITITES OF BOTH ALONG WITH A SIGNIFICANT QUANTITY OF SLAG-FORMING MATERIAL, COMPRISING SMELTING SUCH MINERAL MATERIAL TOGETHER WITH SULFUR AND CARBON, AND WITH IRON IN SUFFICIENT AMOUNT IN SAID MATERIAL TO FORM A MATTE, THERE BEING SUFFICENT SULFUR TO SATISFY THE COLUMBIUM AND IRON STOICHIOMETRICALLY SO AS TO PRODUCE A MATTE PRODUCT IN WHICH THE RATIO OF COLUMBIUM TO TANTALUM IS CONSIDERABLY HIGHER THAN IN THE STARTING MATERIAL AND A SLAG IN WHICH THE RATIO OF TANTALUM OT COLUMBIUM IS CONSIDERABLY HIGHER THAN IN THE STARTING MATERIAL, THE SAID MATTE CONTAINING ESSENTIALLY ALL OF THE IRON; AND DRAWING OFF SAID MATTE PRODUCT SEPARATELY FROM SAID SLAG PRODUCT.
References Cited (Backward Citations)
US2004498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |