US3216822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of niobium by vapor phase reduction of niobium pentachloride
Assignee: Wyandotte Chemicals Corp
•
Filing: 1962-02-28
•
Granted: 1965-11-09
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Expires: 1982-02-28
Abstract
No abstract record available.
Inventors
- 👤 James A Brothers
- 👤 William F Pesold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:31
CPC Classifications
C; C22; C22B; C22B34/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD FOR PRODUCING A METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM, TANTALUM, MOLYBDENUM AND TUNGSTEN COMPRISING THE STEPS OF PASSING ZINC VAPOR INTO CONTACT WITH A CHLORIDE OF SAID METAL IN A REACTION ZONE MAINTAINED AT A TEMPERATURE OF ABOUT 750 TO 1100*C. TO EFFECT REDUCTION OF SAID CHLORIDE TOPRODUCE A MIXTURE OF SAID METAL AND ZINC CHLORIDE AND SEPARATING SAID METAL FROM SAID ZINC CHLORIDE BY CONDENSING AND DEPOSITING SAID MIXTURE AT A TEMPERATURE OF FROM ABOUT 350 TO 550* C., PASSING INERT GAS OVER SAID DEPOSIT AND HEATING SAID DEPOSIT TO A TEMPERATURE RANGING FROMABOUT 750 TO 1100* C. WHEREBY SAID ZINC CHLORIDE IS VAPORIZED AND CARRIED AWAY BY THE GAS FLOW LEAVING A DEPOSIT OF SAID METAL.
Claim 2
Independent Claim
122 words
A METHOD FOR PRODUCING A METAL SELECTED FROM THE GROUP CONSISTING OF NIOBIUM, TANTALUM, MOLYBDENUM AND TUNGSTEN COMPRISING THE STEPS OF PASSING ZINC VAPOR INTO CONTACT WITH A CHLORIDE OF SAID METAL IN A REACTION ZONE MAINTAINED AT A TEMPERATURE OF ABOUT 750 TO 1100*C. TO EFFECT REDUCTION OF SAID CHLORIDE TOPRODUCE A MIXTURE OF SAID METAL AND ZINC CHLORIDE AND SEPARATING SAID METAL FROM SAID ZINC CHLORIDE BY CONDENSING AND DEPOSITING SAID MIXTURE AT A TEMPERATURE OF FROM ABOUT 350 TO 550* C., PASSING INERT GAS OVER SAID DEPOSIT AND HEATING SAID DEPOSIT TO A TEMPERATURE RANGING FROMABOUT 750 TO 1100* C. WHEREBY SAID ZINC CHLORIDE IS VAPORIZED AND CARRIED AWAY BY THE GAS FLOW LEAVING A DEPOSIT OF SAID METAL.
References Cited (Backward Citations)
GB386621A
Cited
US2758021A
Cited
US2983600A
Cited
US3020128A
Cited
US3020148A
Cited
US3012876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |