Patent JPS5510287B2 successfully refreshed from Google Patents.
US3131994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of beryllium values
Assignee: Dow Chemical Co
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Filing: 1961-12-07
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Granted: 1964-05-05
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Expires: 1981-12-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph P Surls
- 👤 Charles W Becker
- 👤 William A Mod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:53
CPC Classifications
C; C22; C22B; C22B35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A PROCESS FOR THE SEPARATION AND RECOVERY OF BERYLLIUM VALUES FROM AN ACIDIC AQUEOUS LEACH SOLUTION OF BERYLLIUM ORE, THE IMPROVEMENT IN REMOVING THE IRON IMPURITIES FROM THE SOLUTION, WHICH COMPRISES CONTACTING THE ACIDIC AQUEOUS LEACH SOLUTION WITH TRISOOCTYLAMINE IN A WATER IMMISCIBLE DILUENT TO EXTRACT THE IRON VALUES FROM THE ACIDIC AQUEOUS SOLUTION.
Claim 2
Dependent Claim
55 words
IN A PROCESS FOR THE SEPARATION AND RECOVERY OF BERYLLIUM VALUES FROM AN ACIDIC AQUEOUS LEACH SOLUTION OF BERYLLIUM ORE, THE IMPROVEMENT IN REMOVING THE IRON IMPURITIES FROM THE SOLUTION, WHICH COMPRISES CONTACTING THE ACIDIC AQUEOUS LEACH SOLUTION WITH TRISOOCTYLAMINE IN A WATER IMMISCIBLE DILUENT TO EXTRACT THE IRON VALUES FROM THE ACIDIC AQUEOUS SOLUTION.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |