US3145081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for concentration and purification of beryllium values
Assignee: Dow Chemical Co
•
Filing: 1961-12-28
•
Granted: 1964-08-18
•
Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph P Suris
- 👤 Robert R Grinstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
C; C01; C01F; C01F3/00; C22; C22B; C22B35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR RECOVERING BERYLLIUM VALUES DISSOLVED IN AN AQUEOUS ACID SOLUTION WHICH COMPRISES: (1) CONTACTING A BERYLLIUM CONTAINING AQUEOUS ACID SOLUTION OF PH FROM ABOUT 0.4 TO ABOUT 2 WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONO- AND DIALKYL SUBSTITUTED ORTHOPHOSPHORIC ACIDS WHREIN THE NUMBER OF CARBON ATOMS PRESENT IN EACH ALKYL GROUP OF SAID SUBSTITUTED ORTHOPHOSPHORIC ACID RANGES FROM ABOUT 4 TOA BUT 18 THEREBY TO EXTRACT SAID BERYLLIUM VALUES FROM SAID AQUEOUS ACID SOLUTION ITO THE ALKYL PHOSPHORIC ACID, (2) SEPARATING THE BERYLLIUM POOR AQUEOUS ACID PHASE AND BERYLLIUMALKYL PHOSPHORIC ACID EXTRACT, (3) AND, CONTACTING THE BERYLLIUM-ALKYL PHOSPHORIC ACID EXTRACT WITH MINERAL ACID THEREBY TO STRIP THE BERYLLIUM VALUES FROM SAID EXTRACE AND RECOVERING THE BERYLLIUM VALUES FROM SAID MINERAL ACID.
Claim 2
Dependent Claim
126 words
A PROCESS FOR RECOVERING BERYLLIUM VALUES DISSOLVED IN AN AQUEOUS ACID SOLUTION WHICH COMPRISES: (1) CONTACTING A BERYLLIUM CONTAINING AQUEOUS ACID SOLUTION OF PH FROM ABOUT 0.4 TO ABOUT 2 WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF MONO- AND DIALKYL SUBSTITUTED ORTHOPHOSPHORIC ACIDS WHREIN THE NUMBER OF CARBON ATOMS PRESENT IN EACH ALKYL GROUP OF SAID SUBSTITUTED ORTHOPHOSPHORIC ACID RANGES FROM ABOUT 4 TOA BUT 18 THEREBY TO EXTRACT SAID BERYLLIUM VALUES FROM SAID AQUEOUS ACID SOLUTION ITO THE ALKYL PHOSPHORIC ACID, (2) SEPARATING THE BERYLLIUM POOR AQUEOUS ACID PHASE AND BERYLLIUMALKYL PHOSPHORIC ACID EXTRACT, (3) AND, CONTACTING THE BERYLLIUM-ALKYL PHOSPHORIC ACID EXTRACT WITH MINERAL ACID THEREBY TO STRIP THE BERYLLIUM VALUES FROM SAID EXTRACE AND RECOVERING THE BERYLLIUM VALUES FROM SAID MINERAL ACID.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |