US2959462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of aqueous solutions to reduce ferric ion to ferrous ion
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1958-06-13
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Granted: 1960-11-08
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Expires: 1978-06-13
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:52
CPC Classifications
C; C01; C01G; C01G49/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR TREATING AN AQUEOUS SOLUTION CONTAINING A SUBSTANCE PROVIDING FERRIC ION COMPRISING ADDING A REDUCING AGENT FOR FERRIC ION TO THE AQUEOUS SOLUTION, THE REDUCING AGENT BEING A SOLUBLE SUBSTANCE YIELDING SULFITE ION IN AQUEOUS SOLUTION, AND REDUCING FERRIC ION TO FERROUS ION WITH THE REDUCING AGENT IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SOLUBLE SUBSTANCE WHICH IS A SOURCE OF THIOCYANATE ION.
Claim 2
Dependent Claim
67 words
A PROCESS FOR TREATING AN AQUEOUS SOLUTION CONTAINING A SUBSTANCE PROVIDING FERRIC ION COMPRISING ADDING A REDUCING AGENT FOR FERRIC ION TO THE AQUEOUS SOLUTION, THE REDUCING AGENT BEING A SOLUBLE SUBSTANCE YIELDING SULFITE ION IN AQUEOUS SOLUTION, AND REDUCING FERRIC ION TO FERROUS ION WITH THE REDUCING AGENT IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SOLUBLE SUBSTANCE WHICH IS A SOURCE OF THIOCYANATE ION.
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |