US2766112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metallic tantalum and metallic niobium from mixtures of compounds thereof
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1952-11-29
•
Granted: 1956-10-09
•
Expires: 1972-11-29
Abstract
No abstract record available.
Inventors
- 👤 Schafer Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:17
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
IN A PROCESS OF PRODUCING A TANTALUM MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALLIC TANTALUM AND TANTALUM HYDRIDE, THE STEPS WHICH COMPRISE PASSING A MIXTURE CONTAINING TANTALUM PENTACHLORIDE AND NIOBIUM PENTACHLORIDE IN A FLOW OF DRY HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 400* C. AND ABOUT 800* C. THROUGH A FIRST REDUCTION ZONE TO REDUCE NIOBIUM PENTACHLORIDE TO A LOWER NIOBIUM CHLORIDE AND TO PRECIPITATE SUCH LOWER NIOBIUM CHLORIDE, AND SUBSEQUENTLY PASSING THE RESULTING GASEOUS MIXTURE OF UNREDUCED TANTALUM PENTACHLORIDE, HYDROGEN, AND HYDROGEN CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 1000*C. AND ABOUT 1300* C. DIRECTLY THROUGH A SECOND REDUCTION ZONE TO REDUCE THE TANTALUM PENTACHLORIDE TO A TANTALUM MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALLIC TANTALUM AND TANTALUM HYDRIDE AND TO PRECIPITATE SUCH TANTALUM MATERIAL.
Claim 2
Dependent Claim
127 words
IN A PROCESS OF PRODUCING A TANTALUM MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALLIC TANTALUM AND TANTALUM HYDRIDE, THE STEPS WHICH COMPRISE PASSING A MIXTURE CONTAINING TANTALUM PENTACHLORIDE AND NIOBIUM PENTACHLORIDE IN A FLOW OF DRY HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 400* C. AND ABOUT 800* C. THROUGH A FIRST REDUCTION ZONE TO REDUCE NIOBIUM PENTACHLORIDE TO A LOWER NIOBIUM CHLORIDE AND TO PRECIPITATE SUCH LOWER NIOBIUM CHLORIDE, AND SUBSEQUENTLY PASSING THE RESULTING GASEOUS MIXTURE OF UNREDUCED TANTALUM PENTACHLORIDE, HYDROGEN, AND HYDROGEN CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 1000*C. AND ABOUT 1300* C. DIRECTLY THROUGH A SECOND REDUCTION ZONE TO REDUCE THE TANTALUM PENTACHLORIDE TO A TANTALUM MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALLIC TANTALUM AND TANTALUM HYDRIDE AND TO PRECIPITATE SUCH TANTALUM MATERIAL.
Claim 3
Dependent Claim
83 words
IN A PROCESS OF PRODUCING METALLIC NIOBIUM, THE STEPS WHICH COMPRISE PASSING A MIXTURE CONTAINING TANTALUM PENTACHLORIDE AND NIOBIUM PENTACHLORIDE IN A FLOW OF DRY HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 400* C. AND ABOUT 800* C. THROUGH A REDUCTION ZONE TO REDUCE NIOBIUM PENTACHLORIDE TO NIOBIUM TRICHLORIDE AND TO PRECIPITATE SUCH NIOBIUM TRICHLORIDE, AND HEATING THE PRECIPITATED NIOBIUM TRICHLORIDE IN A FLOW OF HYDROGEN TO A TEMPERATURE BETWEEN ABOUT 800*C. AND ABOUT 1300* C. TO REDUCE SUCH NIOBIUM TRICHLORIDE TO METALLIC NIOBIUM.
Claim 4
Dependent Claim
83 words
IN A PROCESS OF PRODUCING METALLIC NIOBIUM, THE STEPS WHICH COMPRISE PASSING A MIXTURE CONTAINING TANTALUM PENTACHLORIDE AND NIOBIUM PENTACHLORIDE IN A FLOW OF DRY HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 400* C. AND ABOUT 800* C. THROUGH A REDUCTION ZONE TO REDUCE NIOBIUM PENTACHLORIDE TO NIOBIUM TRICHLORIDE AND TO PRECIPITATE SUCH NIOBIUM TRICHLORIDE, AND HEATING THE PRECIPITATED NIOBIUM TRICHLORIDE IN A FLOW OF HYDROGEN TO A TEMPERATURE BETWEEN ABOUT 800*C. AND ABOUT 1300* C. TO REDUCE SUCH NIOBIUM TRICHLORIDE TO METALLIC NIOBIUM.
References Cited (Backward Citations)
US1289079A
Cited
US2429671A
Cited
US2242759A
Cited
US2452665A
Cited
US2443254A
Cited
US2516863A
Cited
GB646375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |