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US3109732A
Expired / Lapsed
US
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Reduction of ferric ions in aqueous solutions
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1960-06-15
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Granted: 1963-11-05
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Expires: 1980-06-15
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:43
CPC Classifications
C; C01; C01G; C01G49/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A PROCESS FOR REDUCING FERRIC ION TO FERROUS ION WHEREIN AN AQUEOUS MEDIUM CONTAINING A SUBSTANCE PROVIDING FERRIC ION IS PASSED THROUGH A BED OF ACTIVATED CARBON CATALYST AND FERRIC ION REDUCED TO FERROUS ION BY MEANS BY A REDUCTANT WHICH IS A WATER-SOLUBLE SUBSTANCE YIELDING IN AQUEOUS SOLUTION A REDUCING ION SELECTED FROM THE GROUP CONSISTING OF SULFITE ION AND BISULFITE ION, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING DISSOLVING THE REDUCTANT IN THE AQUEOUS MEDIUM AND THEN PASSING THE AQUEOUS MEDIUM CONTAINING THE DISSOLVED REDUCTANT THROUGH THE BED OF ACTIVATED CARBON CATALYST.
Claim 2
Dependent Claim
17 words
THE PROCESS OF CLAIM 9 WHEREIN THE AQUEOUS MEDIUM IS A HYDROMETALLURGICAL LEACH LIQUOR CONTAINING IRON VALUES.
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |