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Patent US3291597A successfully refreshed from Google Patents.
US3291597A
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Process for recovering metal values utilizing fused salts
Assignee: Cyprus Amax Minerals Co
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Filing: 1964-07-06
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Granted: 1966-12-13
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Mellgren Svante
- 👤 Lamar D Coffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:25
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE PROCESS FOR RECOVERING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, LEAD, CADMIUM AND MOLYBDENUM, FROM A FUSED SALT BATH CONSISTING ESSENTIALLY OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HALIDES AND ALKALINE EARTH METAL HALIDES, AND CONTAINING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, LEAD, CADMIUM, MOLYBDENUM, COMPRISING ADDING TO SAID BATH AN AMOUNT OF ALUMINUM IN EXCESS OF THAT REQUIRED TO REDUCE SAID METAL TO THE METALLIC STATE THEREBY FORMING A MOLTEN ALUMINUM POOL AND THEREAFTER RECOVERING SAID METAL FROM SAID BATH.
Claim 2
Dependent Claim
97 words
THE PROCESS FOR RECOVERING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, LEAD, CADMIUM AND MOLYBDENUM, FROM A FUSED SALT BATH CONSISTING ESSENTIALLY OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HALIDES AND ALKALINE EARTH METAL HALIDES, AND CONTAINING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, LEAD, CADMIUM, MOLYBDENUM, COMPRISING ADDING TO SAID BATH AN AMOUNT OF ALUMINUM IN EXCESS OF THAT REQUIRED TO REDUCE SAID METAL TO THE METALLIC STATE THEREBY FORMING A MOLTEN ALUMINUM POOL AND THEREAFTER RECOVERING SAID METAL FROM SAID BATH.
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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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |