Patent US2865709A successfully refreshed from Google Patents.
US2865709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silico fluorides
Assignee: International Minerals and Chemical Corp
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Filing: 1955-09-12
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Granted: 1958-12-23
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Horn Hans
- 👤 Robert F Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:56
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08; C01B33/10; C01B33/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR PRODUCING SUBSTANITALLY WATER INSOLUBLE SILICO FLUROIDE SALTS OF HIGH PURITY FROM CRUDE FLUOSILICIC ACID SOLUTION HAVING A FLUORINE TO SILICON MOL RATIO LESS THAN ABOUT 4.4:1, WHICH COMPRISES ADJUSTING THE MOL RATIO OF FLUORINE TO SILICON OF THE CRUDE SOLUTION TO A RATIO BETWEEN 4.5:1 AND 6:1 BY ADDING A BASIC AMMMONIA REACTANT, SEPARATING INSOLUBLE SILICA-CONTAINING MATERIAL FROM THE F/SI ADJUSTED SOLUTION AND REACTING THE ADJUSTED SOLUTION WITH A WATER SOLUBLE SALT OF A CATION WHOSE SILICO-FLUORIDE SALT IS WATER INSOLUBLE.
Claim 2
Dependent Claim
84 words
A PROCESS FOR PRODUCING SUBSTANITALLY WATER INSOLUBLE SILICO FLUROIDE SALTS OF HIGH PURITY FROM CRUDE FLUOSILICIC ACID SOLUTION HAVING A FLUORINE TO SILICON MOL RATIO LESS THAN ABOUT 4.4:1, WHICH COMPRISES ADJUSTING THE MOL RATIO OF FLUORINE TO SILICON OF THE CRUDE SOLUTION TO A RATIO BETWEEN 4.5:1 AND 6:1 BY ADDING A BASIC AMMMONIA REACTANT, SEPARATING INSOLUBLE SILICA-CONTAINING MATERIAL FROM THE F/SI ADJUSTED SOLUTION AND REACTING THE ADJUSTED SOLUTION WITH A WATER SOLUBLE SALT OF A CATION WHOSE SILICO-FLUORIDE SALT IS WATER INSOLUBLE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |