US3696012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing supersaturation of electrolytes with arsenic,antimony and bismuth
Assignee: Aurubis AG
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Filing: 1971-01-12
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Granted: 1972-10-03
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Expires: 1991-01-12
Abstract
Abstract A PROCESS FOR PREVENTING EXCESSIVE ACCUMULATION OF ARSENIC, ANTIMONY AND BISMUTH IN ELECTROLYTES USED IN THE ELECTROLYTIC REFINING OF NONFERROUS METALS, ESPECIALLY COPPER. THE PROCESS INVOLVES ADSORBING THESE IMPURITIES UPON A CHEMICAL ADSORBENT IN THE FORM OF A LOW-SOLUBILITY METALOXIDE HYDRATE (ESPECIALLY STANNIC ACID) STABLE IN THE PRESENCE OF SULFURIC ACID.
Inventors
- 👤 Reinhold Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:45
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/06; C25C1/00; C25C1/12
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |