US2561439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating lithiferous ores to recover lithium as lithium chloride
Assignee: Union Carbide Corp
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Filing: 1947-07-08
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Granted: 1951-07-24
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Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 Hendrik De W Erasmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:02
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; C22B26/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
METHOD OF TREATING LITHIFEROUS ORES TO RECOVER LITHIUM AS LITHIUM CHLORIDE WHICH COMPRISES MIXING COMMINUTED LITHIFEROUS ORE AND CALCIUM CHLORIDE, HEATING SAID MIXTURE AT A TEMPERATURE BETWEEN 800* C. AND 1200* C. AT A PRESSURE OF LESS THAN 20 MM. MERCURY ABSOLUTE, AND CONDENSING AND COLLECTING VOLATILE LITHIUM CHLORIDE.
Claim 2
Dependent Claim
49 words
METHOD OF TREATING LITHIFEROUS ORES TO RECOVER LITHIUM AS LITHIUM CHLORIDE WHICH COMPRISES MIXING COMMINUTED LITHIFEROUS ORE AND CALCIUM CHLORIDE, HEATING SAID MIXTURE AT A TEMPERATURE BETWEEN 800* C. AND 1200* C. AT A PRESSURE OF LESS THAN 20 MM. MERCURY ABSOLUTE, AND CONDENSING AND COLLECTING VOLATILE LITHIUM CHLORIDE.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |