US2586649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of indium values as indium arsenate
Assignee: National Zinc Co Inc
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Filing: 1948-02-04
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Granted: 1952-02-19
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Expires: 1968-02-04
Abstract
No abstract record available.
Inventors
- 👤 James L Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:10
CPC Classifications
C; C01; C01G; C01G15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF SELECTIVELY PRECIPITATING INDIUM VALUES FROM AN ACID INDIUM-BEARING SOLUTION CONTAINING IMPURITIES AND HAVING A PH VALUE OF LESS THAN 2.5 WHICH COMPRISES ADJUSTING THE PH VALUE OF THE SOLUTION TO BETWEEN 2.50 AND 3.70 IN THE PRESENCE OF A SOLUBLE ARSENATE AND THEREBY SELECTED PRECIPITATING THE INDIUM AS ARSENATE, AND RECOVERING THE INDIUM ARSENATE
Claim 2
Independent Claim
57 words
THE METHOD OF SELECTIVELY PRECIPITATING INDIUM VALUES FROM AN ACID INDIUM-BEARING SOLUTION CONTAINING IMPURITIES AND HAVING A PH VALUE OF LESS THAN 2.5 WHICH COMPRISES ADJUSTING THE PH VALUE OF THE SOLUTION TO BETWEEN 2.50 AND 3.70 IN THE PRESENCE OF A SOLUBLE ARSENATE AND THEREBY SELECTED PRECIPITATING THE INDIUM AS ARSENATE, AND RECOVERING THE INDIUM ARSENATE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |