US2980499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of lithium from lithium bearing ores
Assignee: Dow Chemical Co
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Filing: 1957-01-29
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Granted: 1961-04-18
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Expires: 1977-01-29
Abstract
No abstract record available.
Inventors
- 👤 Robert D Goodenough
- 👤 Vernon A Stenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; C22B26/12; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR THE RECOVERY OF LITHIUM VALUES FROM SOLID LEPIDOLITE, WHICH COMPRISES HEATING THE SOLID LEPIDOLITE AT A TEMPERATURE BELOW THE FUSION POINT IN THE RANGE OF 850* TO 1200*C., COOLING THE HEATED LEPIDOLITE, CONTACTING THE COOLED SOLID LEPIDOLITE, IN THE PRESENCE OF WATER, WITH A SOLID, STRONGLY ACIDIC CATION EXCHANGE RESIN AT A TEMPERATURE FROM 95* TO 150*C., SEPARATING THE CONTACTED LEPIDOLITE FROM THE RESIN, AND RECOVERING THE LITHIUM VALUES FROM THE RESIN.
Claim 2
Dependent Claim
75 words
A PROCESS FOR THE RECOVERY OF LITHIUM VALUES FROM SOLID LEPIDOLITE, WHICH COMPRISES HEATING THE SOLID LEPIDOLITE AT A TEMPERATURE BELOW THE FUSION POINT IN THE RANGE OF 850* TO 1200*C., COOLING THE HEATED LEPIDOLITE, CONTACTING THE COOLED SOLID LEPIDOLITE, IN THE PRESENCE OF WATER, WITH A SOLID, STRONGLY ACIDIC CATION EXCHANGE RESIN AT A TEMPERATURE FROM 95* TO 150*C., SEPARATING THE CONTACTED LEPIDOLITE FROM THE RESIN, AND RECOVERING THE LITHIUM VALUES FROM THE RESIN.
References Cited (Backward Citations)
US2648601A
Cited
US2516109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |