US2952641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strontium precipitation
Assignee: Individual
•
Filing: 1959-12-01
•
Granted: 1960-09-13
•
Expires: 1979-12-01
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:38
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; G; G21; G21F; G21F9/00; G21F9/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROVESS OF REMOVING STRONTIUM VALUES FROM AN AQUEOUS ACID SOLUTION CONTAINING SAID STRONTIUM VALUES AND PHOSPHORIC ACID ANIONS COMPRISING INCORPORATION A METAL FERROCYANIDE PRECIPITATE INTO SAID SOLUTION, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL AND COBALT, ADDING AN ALKALINE EARTH METAL NITRATE SELECTED FROM THE GROUP CONSISTING OF STRONTIUM NITRATE AND CALCIUM NITRATE TO SAID SOLUTION TO OBTAIN A CONCENTRATION OF FROM 0.004 TO 0.03 M AND ADJUSTING THE PH VALUE TO ABOVE 8, AND SEPARATING THE PRECIPITATE FROM THE SOLUTION.
Claim 2
Dependent Claim
85 words
A PROVESS OF REMOVING STRONTIUM VALUES FROM AN AQUEOUS ACID SOLUTION CONTAINING SAID STRONTIUM VALUES AND PHOSPHORIC ACID ANIONS COMPRISING INCORPORATION A METAL FERROCYANIDE PRECIPITATE INTO SAID SOLUTION, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF NICKEL AND COBALT, ADDING AN ALKALINE EARTH METAL NITRATE SELECTED FROM THE GROUP CONSISTING OF STRONTIUM NITRATE AND CALCIUM NITRATE TO SAID SOLUTION TO OBTAIN A CONCENTRATION OF FROM 0.004 TO 0.03 M AND ADJUSTING THE PH VALUE TO ABOVE 8, AND SEPARATING THE PRECIPITATE FROM THE SOLUTION.
References Cited (Backward Citations)
US2769780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |