US2695226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indium purification using barium sulfate, strontium sulfate, or both
Assignee: American Smelting and Refining Co
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Filing: 1952-01-31
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Granted: 1954-11-23
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Expires: 1972-01-31
Abstract
No abstract record available.
Inventors
- 👤 Yurii E Lebedeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:43
CPC Classifications
C; C22; C22B; C22B58/00; C01; C01G; C01G15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR REMOVING MORE THAN 90% OF THE TIN PRESENT IN A MINERAL ACID SOLUTION OF INDIUM CONTAINING LESS THAN ABOUT 0.5 GRAM PER LITER OF DISSOLVED TIN AS AN IMPURITY WHICH CONSISTS OF FORMING IN THE SOLUTION ABOUT 10-30 GRAMS PER LITER OF A PRECIPITATE OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BARIUM SULFATE, STRONTIUM SULFATE, AND MIXTURES THEREOF WHILE AGITATING SAID SOLUTION AND MAINTAINING IT AT A TEMPERATURE IN THE RANGE OF ABOUT 40-80* C., AND SEPARATING THE PRECIPITATE FROM THE SOLUTION THEREBY REMOVING MORE THAN 90% OF SAID DISSOLVED TIN FROM THE SOLUTION.
Claim 2
Dependent Claim
99 words
A PROCESS FOR REMOVING MORE THAN 90% OF THE TIN PRESENT IN A MINERAL ACID SOLUTION OF INDIUM CONTAINING LESS THAN ABOUT 0.5 GRAM PER LITER OF DISSOLVED TIN AS AN IMPURITY WHICH CONSISTS OF FORMING IN THE SOLUTION ABOUT 10-30 GRAMS PER LITER OF A PRECIPITATE OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BARIUM SULFATE, STRONTIUM SULFATE, AND MIXTURES THEREOF WHILE AGITATING SAID SOLUTION AND MAINTAINING IT AT A TEMPERATURE IN THE RANGE OF ABOUT 40-80* C., AND SEPARATING THE PRECIPITATE FROM THE SOLUTION THEREBY REMOVING MORE THAN 90% OF SAID DISSOLVED TIN FROM THE SOLUTION.
References Cited (Backward Citations)
US2192154A
Cited
US2271970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |