Patent US3131998A successfully refreshed from Google Patents.
US3131998A
Expired / Lapsed
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Liquid-liquid extraction recovery of cobalt values using a quaternary ammonium extractant
Assignee: General Mills Inc
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Filing: 1962-02-15
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Granted: 1964-05-05
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Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
- 👤 Ronald R Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:03
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/288; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR THE RECOVERY OF COBALT VALUES FROM AN AQUEOUS SOLUTION, SAID AQUEOUS SOLUTION HAVING A PH OF LESS THAN ABOUT 7.0 AND CONTAINING SUFFICIENT CHLORIDE IONS TO FORM TETRACHLOROCOBALTATE ANIONS WITH THE COBALT VALUES, COMPRISING CONTACTING SAID AQUEOUS SOLUTION WITH
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE RECOVERY OF COBALT VALUES FROM AN AQUEOUS SOLUTION, SAID AQUEOUS SOLUTION HAVING A PH OF LESS THAN ABOUT 7.0 AND CONTAINING SUFFICIENT CHLORIDE IONS TO FORM TETRACHLOROCOBALTATE ANIONS WITH THE COBALT VALUES, COMPRISING CONTACTING SAID AQUEOUS SOLUTION WITH
References Cited (Backward Citations)
US2840451A
Cited
US2877250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |