US2618531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying zirconium tetrachloride vapors
Assignee: Individual
•
Filing: 1949-09-26
•
Granted: 1952-11-18
•
Expires: 1969-09-26
Abstract
No abstract record available.
Inventors
- 👤 Lindblad Robert Hugo
- 👤 Pyk Sven Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:26
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR PRODUCING PURE ZIRCONIUM TETRACHLORIDE FROM ZIRCONIUM RAW MATERIALS CONTAINING, IN ADDITION TO ZIRCONIUM, IMPURITIES OF IRON AND CHROMIUM; WHICH COMPRISES CHLORINATING THE SAID ZIRCONIUM RAW MATERIAL AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 300* TO 400* C., THUS PRODUCING SUBLIMATED VAPORS OF ZIRCONIUM TETRACHLORIDE MIXED WITH IRON AND CHROMIUM CHLORIDE IMPURITIES, PASSING A STREAM OF THESE VAPORS IN THE ABSENCE OF FREE CHLORINE WITHIN THE SAME TEMPERATURE RANGE IN DIRECT SURFACE CONTACT, WITH A METAL OF THE GROUP CONSISTING OF ZINC, CADMIUM AND MANGANESE, THEREBY REDUCING THE CHLORIDE IMPURITIES AND RENDERING THEM NON-VOLATILE WITHOUT SUBSTANTIAL REDUCTION OF THE ZIRCONIUM TETRACHLORIDE AND DIRECTLY THEREAFTER RECOVERING ZIRCONIUM TETRACHLORIDE FROM THE SO-PURIFIED STREAM OF VAPORS.
Claim 2
Dependent Claim
117 words
A PROCESS FOR PRODUCING PURE ZIRCONIUM TETRACHLORIDE FROM ZIRCONIUM RAW MATERIALS CONTAINING, IN ADDITION TO ZIRCONIUM, IMPURITIES OF IRON AND CHROMIUM; WHICH COMPRISES CHLORINATING THE SAID ZIRCONIUM RAW MATERIAL AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 300* TO 400* C., THUS PRODUCING SUBLIMATED VAPORS OF ZIRCONIUM TETRACHLORIDE MIXED WITH IRON AND CHROMIUM CHLORIDE IMPURITIES, PASSING A STREAM OF THESE VAPORS IN THE ABSENCE OF FREE CHLORINE WITHIN THE SAME TEMPERATURE RANGE IN DIRECT SURFACE CONTACT, WITH A METAL OF THE GROUP CONSISTING OF ZINC, CADMIUM AND MANGANESE, THEREBY REDUCING THE CHLORIDE IMPURITIES AND RENDERING THEM NON-VOLATILE WITHOUT SUBSTANTIAL REDUCTION OF THE ZIRCONIUM TETRACHLORIDE AND DIRECTLY THEREAFTER RECOVERING ZIRCONIUM TETRACHLORIDE FROM THE SO-PURIFIED STREAM OF VAPORS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |