Patent US2929705A successfully refreshed from Google Patents.
US2929705A
Expired / Lapsed
US
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Process of treating amalgams of metals which are difficultly soluble in mercury
Assignee: Siemens and Halske AG
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Filing: 1957-07-25
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Granted: 1960-03-22
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Expires: 1977-07-25
Abstract
No abstract record available.
Inventors
- 👤 Hohn Hans
- 👤 Gerassimoff Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:18
CPC Classifications
C; C22; C22C; C22C3/00; C22C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS OF RECOVERING A METAL WHICH IS DIFFICULTY SOLUBLE IN MERCURY FROM AN AMALGAM CONTAINING SAID METAL IN THE FORM OF DISTINCT SOLID GRAINS BY ADDING TO SAID AMALGAM A METAL WHICH HAS A HIGHER AFFINITY TO OXYGEN THAN SAID DIFFICULTY SOLUBLE METAL AND WHICH IS AT LEAST PARTLY SOLUBLE IN MERCURY, THEN SEPARATING MERCURY IN THE LIQUID PHASE FROM SAID AMALGAM TO FORM RESIDUAL AMALGAM ENRICHED WITH SAID DIFFICULTY SOLUBLE METAL ALLOWING SAID DIFFICULTY SOLUBLE METAL IN SAID RESIDUAL AMALGAM TO OXIDIZE TO OBTAIN AN OXIDE-COVERED AMALGAM POWDER AND MERCURY WHICH IS SUBSTANTIALLY FREE OF SAID DIFFICULTY SOLUBLE METAL, AND SEPARATING SAID AMALGAM POWDER FROM SAID MERCURY.
Claim 2
Dependent Claim
109 words
A PROCESS OF RECOVERING A METAL WHICH IS DIFFICULTY SOLUBLE IN MERCURY FROM AN AMALGAM CONTAINING SAID METAL IN THE FORM OF DISTINCT SOLID GRAINS BY ADDING TO SAID AMALGAM A METAL WHICH HAS A HIGHER AFFINITY TO OXYGEN THAN SAID DIFFICULTY SOLUBLE METAL AND WHICH IS AT LEAST PARTLY SOLUBLE IN MERCURY, THEN SEPARATING MERCURY IN THE LIQUID PHASE FROM SAID AMALGAM TO FORM RESIDUAL AMALGAM ENRICHED WITH SAID DIFFICULTY SOLUBLE METAL ALLOWING SAID DIFFICULTY SOLUBLE METAL IN SAID RESIDUAL AMALGAM TO OXIDIZE TO OBTAIN AN OXIDE-COVERED AMALGAM POWDER AND MERCURY WHICH IS SUBSTANTIALLY FREE OF SAID DIFFICULTY SOLUBLE METAL, AND SEPARATING SAID AMALGAM POWDER FROM SAID MERCURY.
References Cited (Backward Citations)
CA502939A
Cited
US2758921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |