US2974011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying beryllium compounds
Assignee: Pechiney SA
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Filing: 1959-01-27
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Granted: 1961-03-07
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Expires: 1979-01-27
Abstract
No abstract record available.
Inventors
- 👤 Riabovol Prokop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
C; C01; C01F; C01F3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PURIFICATION OF BERYLLIUM COMPOUNDS COMPRISING THE STEPS OF TREATING AN AQUEOUS SOLUTION OF A WATER SOLUBLE INORGANIC BERYLLIUM SALT HAVING AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF SILICON, MANGANESE AND PHOSPHOROUS, WITH A PRECPITATE OF ZINC HYDROXIDE IN THE PRESENCE OF FLUOIRDE IONS WHILE MAINTAINING THE PH OF THE SOLUTION LOWER THAN THAT CORRESPONDING TO THE PRECIPITATION OF BERYLLIUM HYDROXIDE, SEPARATING THE PRECIPITATED ZINC HYDROXIDE FROM THE SOLUTION, THEN ADDING AN ALKALINE AGENT TO RAISE THE PH OF THE SOLUTION SEPARATED FROM THE ZINC HYDROXIDE PRECIPITATE, UNTIL THE BERYLLIUM HYDROXIDE PRECIPITATES, AND SEPARATING THE BERYLLIUM HYDROXIDE PRECIPITATE FROM ITS MOTHER LIQUOR.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PURIFICATION OF BERYLLIUM COMPOUNDS COMPRISING THE STEPS OF TREATING AN AQUEOUS SOLUTION OF A WATER SOLUBLE INORGANIC BERYLLIUM SALT HAVING AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF SILICON, MANGANESE AND PHOSPHOROUS, WITH A PRECPITATE OF ZINC HYDROXIDE IN THE PRESENCE OF FLUOIRDE IONS WHILE MAINTAINING THE PH OF THE SOLUTION LOWER THAN THAT CORRESPONDING TO THE PRECIPITATION OF BERYLLIUM HYDROXIDE, SEPARATING THE PRECIPITATED ZINC HYDROXIDE FROM THE SOLUTION, THEN ADDING AN ALKALINE AGENT TO RAISE THE PH OF THE SOLUTION SEPARATED FROM THE ZINC HYDROXIDE PRECIPITATE, UNTIL THE BERYLLIUM HYDROXIDE PRECIPITATES, AND SEPARATING THE BERYLLIUM HYDROXIDE PRECIPITATE FROM ITS MOTHER LIQUOR.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |