US2948591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selenium recovery process
Assignee: Cyprus Amax Minerals Co
•
Filing: 1957-03-22
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Granted: 1960-08-09
•
Expires: 1977-03-22
Abstract
No abstract record available.
Inventors
- 👤 Erwin C Handwerk
- 👤 Walter T Monson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:30
CPC Classifications
C; C01; C01B; C01B19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE PROCESS FOR TREATING A SELENIUM BEARING MATERAIL SUCH AS COPPER ANODE SLIMES, MUDS, SLUDGES AND DUSTS WHEREIN THE MATERIAL IN FINELY DIVIDED FORM IS CONTROLLABLY HEATED IN A SELENIUM-OXIDIZING ATMOSPHERE TO CONVERT THE SELENIUM CONTENT THERETO TO AN OXIDIZED STATE WITHOUT APPRECIABLY FUSING THE CHARGE WHEREBY THE SELECTIVE SEPARATION OF SELENIUM FROM SAID MATERIAL IS FACILITATED, THE IMPROVEMENT WHICH COMPRISES INTIMATELY MIXING THE SELENIUM-BEARING MATERIAL WITH A BINDER AND SUFFICIENT WATER TO PROVIDE A CONSISTENCY OF THE MIXTURE SUITABLE FOR AGGLOMERATION, COMPACTING THE RESULTING MIXTURE TO PROVIDE
Claim 2
Dependent Claim
89 words
IN THE PROCESS FOR TREATING A SELENIUM BEARING MATERAIL SUCH AS COPPER ANODE SLIMES, MUDS, SLUDGES AND DUSTS WHEREIN THE MATERIAL IN FINELY DIVIDED FORM IS CONTROLLABLY HEATED IN A SELENIUM-OXIDIZING ATMOSPHERE TO CONVERT THE SELENIUM CONTENT THERETO TO AN OXIDIZED STATE WITHOUT APPRECIABLY FUSING THE CHARGE WHEREBY THE SELECTIVE SEPARATION OF SELENIUM FROM SAID MATERIAL IS FACILITATED, THE IMPROVEMENT WHICH COMPRISES INTIMATELY MIXING THE SELENIUM-BEARING MATERIAL WITH A BINDER AND SUFFICIENT WATER TO PROVIDE A CONSISTENCY OF THE MIXTURE SUITABLE FOR AGGLOMERATION, COMPACTING THE RESULTING MIXTURE TO PROVIDE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |