US2770526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for purifying metal halides
Assignee: Metal Hydrides Inc
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Filing: 1955-12-19
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Granted: 1956-11-13
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Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Horace N Lander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:00
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/24; C01F11/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF TREATING IMPURE CALCIUM CHLORIDE TO REMOVE IMPURITIES WHICH COMPRISES HEATING THE CALCIUM CHLORIDE TO RENDER IT ANHYDROUS, AND THEN HEATING THE ANHYDROUS MATERIAL FOR AT LEAST ABOUT 1 TO 4 HOURS AT A TEMPERATURE BETWEEN ABOUT 425* C. AND 650* C. IN INTIMATE CONTACT WITH A GASEOUS TETRACHLORIDE UNDER A PRESSURE CHLORINE AND CARBON TETRACHLORIDE UNDER A PRESSURE SLIGHTLY GREATER THAN ONE ATMOSPHERE, THE MINUMUM REQUIRED RATIO OF CHLORINE TO CARBON TETRACHLORIDE BY VOLUME IN THE GASEOUS MEDIUM DEPENDING UPON THE TEMPERATURE USED AND VARYING FROM A MINIMUM RATIO OF ABOUT 1 TO 2 AT A TEMPERATURE OF ABOUT 425* C. TO A MINIMUM RATIO OF ABOUT 15.5 TO 1 AT A TEMPERATURE OF ABOUT 650* C.
Claim 2
Independent Claim
120 words
THE METHOD OF TREATING IMPURE CALCIUM CHLORIDE TO REMOVE IMPURITIES WHICH COMPRISES HEATING THE CALCIUM CHLORIDE TO RENDER IT ANHYDROUS, AND THEN HEATING THE ANHYDROUS MATERIAL FOR AT LEAST ABOUT 1 TO 4 HOURS AT A TEMPERATURE BETWEEN ABOUT 425* C. AND 650* C. IN INTIMATE CONTACT WITH A GASEOUS TETRACHLORIDE UNDER A PRESSURE CHLORINE AND CARBON TETRACHLORIDE UNDER A PRESSURE SLIGHTLY GREATER THAN ONE ATMOSPHERE, THE MINUMUM REQUIRED RATIO OF CHLORINE TO CARBON TETRACHLORIDE BY VOLUME IN THE GASEOUS MEDIUM DEPENDING UPON THE TEMPERATURE USED AND VARYING FROM A MINIMUM RATIO OF ABOUT 1 TO 2 AT A TEMPERATURE OF ABOUT 425* C. TO A MINIMUM RATIO OF ABOUT 15.5 TO 1 AT A TEMPERATURE OF ABOUT 650* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |