US2827361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of dissolved silicon values from germanium solutions
Assignee: American Smelting and Refining Co
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Filing: 1955-10-17
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Granted: 1958-03-18
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Yurii E Lebedeff
- 👤 William H Wetherill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:47
CPC Classifications
C; C01; C01G; C01G17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF REMOVING DISSOLVED SISICON VALUES CONTAINED IN AN AQUEOUS SOLUTION HAVING DISSOLVED GERMANIUM VALUES THEREIN AND HAVING A PH VALUE OF AT LEAST 7 WHICH COMPRISES ADDING SOLUBLE INORGANIC ALUMINUM VALUES TO THE SOLUTION WHEREBY INSOLUBLE SILICON VALUES ARE PRECIPITATED FROM THE SOLUTION, AND SPEARATING THE RESULTING SILICON-CONTAINING PRECIPITATE FROM THE SOLUTION.
Claim 2
Independent Claim
54 words
A METHOD OF REMOVING DISSOLVED SISICON VALUES CONTAINED IN AN AQUEOUS SOLUTION HAVING DISSOLVED GERMANIUM VALUES THEREIN AND HAVING A PH VALUE OF AT LEAST 7 WHICH COMPRISES ADDING SOLUBLE INORGANIC ALUMINUM VALUES TO THE SOLUTION WHEREBY INSOLUBLE SILICON VALUES ARE PRECIPITATED FROM THE SOLUTION, AND SPEARATING THE RESULTING SILICON-CONTAINING PRECIPITATE FROM THE SOLUTION.
References Cited (Backward Citations)
US1812347A
Cited
US2390687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |