US3095270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating silica from zirconium sulphate solutions
Assignee: Columbia-National Corp
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Filing: 1959-02-26
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Granted: 1963-06-25
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Expires: 1979-02-26
Abstract
No abstract record available.
Inventors
- 👤 Korach Malcolm
- 👤 Iii James K Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:35
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF A SEPARATING SILICA FROM ZIRCONIUM WHICH COMPRISES FORMING A XIRCONIUM-SULPHATE SOLUTION WHICH CONTAINS SILICA AS AN IMPURITY AND IN WHICH THE WEIGHT RATIO OF SO4 TO ZR IS AT LEAST 2.5, THE CONCENTRATION OF FREE H2SO4 BENG AT LEAST 10 PERCENT BY WEIGHT BUT NOT IN EXCESS OF 45 PERCENT BY WEIGHT AND THE AMOUNT OF WATER IN SAID SOLUTION BEING SUFFICIENT TO HOLD THE ZIRCONIUM IN SOLUTION AND TO PRODUCE A FLUID SOLUTION, HEATING THE SOLUTION AT A TEMPERATURE OF AT LEAST 125*F. UNTIL SILICA HAS PRECIPITATED, AND SEPARATING THE PRECIPITATE FROM THE ZIRCONIUM SOLUTION.
Claim 2
Independent Claim
99 words
A METHOD OF A SEPARATING SILICA FROM ZIRCONIUM WHICH COMPRISES FORMING A XIRCONIUM-SULPHATE SOLUTION WHICH CONTAINS SILICA AS AN IMPURITY AND IN WHICH THE WEIGHT RATIO OF SO4 TO ZR IS AT LEAST 2.5, THE CONCENTRATION OF FREE H2SO4 BENG AT LEAST 10 PERCENT BY WEIGHT BUT NOT IN EXCESS OF 45 PERCENT BY WEIGHT AND THE AMOUNT OF WATER IN SAID SOLUTION BEING SUFFICIENT TO HOLD THE ZIRCONIUM IN SOLUTION AND TO PRODUCE A FLUID SOLUTION, HEATING THE SOLUTION AT A TEMPERATURE OF AT LEAST 125*F. UNTIL SILICA HAS PRECIPITATED, AND SEPARATING THE PRECIPITATE FROM THE ZIRCONIUM SOLUTION.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |