US3562151A
Expired / Lapsed
US
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Demetalation with cyanide ion
Assignee: Chevron USA Inc
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Filing: 1968-10-10
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Granted: 1971-02-09
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Expires: 1988-10-10
Abstract
Abstract A PROCESS FOR THE REMOVAL OF IRON FROM IRON-CONTAMINATED HYDROCARBON OIL BY CONTACTING THE OIL WITH A TREATING AGENT COMPRISING AN AQUEOUS SOLUTION OF CYANIDE ION. IRON MAY BE SELECTIVELY REMOVED FROM AN OIL CONTAMINATED WITH NICKEL AND VANADIUM AS WELL AS IRON. A REFINERY FOUL WATER MAY BE THE SOURCE OF THE CYANIDE ION.
Inventors
- 👤 Gordon E Langlois
- 👤 Lloyd J Olson
- 👤 Charles E Rudy Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
C; C10; C10G; C10G19/00; C10G29/00; C10G29/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |