Patent US3082061A successfully refreshed from Google Patents.
US3082061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of potassium fluosilicate
Assignee: International Minerals and Chemical Corp
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Filing: 1960-09-19
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Granted: 1963-03-19
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Barry
- 👤 Woodrow W Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:43
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08; C01B33/10; C01B33/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF THE PRODUCTION OF POTASSIUM FLUOSILICATE SUBSTANTIALLY FREE OF PHOSPHORUS AND MAGNESIUM CONTAMINATION FROM FLUOSILICIC ACID CONTAMINATED WITH A SUBSTANTIAL AMOUNT OF PHOSPHORUS AS PHOSPHORIC ACID AND A COMPLEX SALT CONTAINING MAGNESIUM SULFATE AND POTASSIUM SUFATE WHICH COMPRISES REACTING A COMPLEX SALT CONTAINING MAGNESIUM SULFATE AND POTASSUM SULFATE SELECTED FROM THE GROUP CONSISTING OF LONGBEINITE, SHOENITE, LEONITE, AND MIXTURES THEREOF, WITH A STOICHIOMETIC EXCESS OF SAID FLUOSILICIC ACID CONTAMINATED WITH PHOSPHORUS, THEREBY FORMING SOLID POTASSIUM FLUOSILICATE, AND SEPARATING THE RESULTANT SOLID FLUOSILICATE SUBSTANTIALLY FREE OF PHOSPHORUS AND MAGNESIUM CONTAMINATION FROM THE RESULTING SOLUTION.
Claim 2
Independent Claim
95 words
A METHOD OF THE PRODUCTION OF POTASSIUM FLUOSILICATE SUBSTANTIALLY FREE OF PHOSPHORUS AND MAGNESIUM CONTAMINATION FROM FLUOSILICIC ACID CONTAMINATED WITH A SUBSTANTIAL AMOUNT OF PHOSPHORUS AS PHOSPHORIC ACID AND A COMPLEX SALT CONTAINING MAGNESIUM SULFATE AND POTASSIUM SUFATE WHICH COMPRISES REACTING A COMPLEX SALT CONTAINING MAGNESIUM SULFATE AND POTASSUM SULFATE SELECTED FROM THE GROUP CONSISTING OF LONGBEINITE, SHOENITE, LEONITE, AND MIXTURES THEREOF, WITH A STOICHIOMETIC EXCESS OF SAID FLUOSILICIC ACID CONTAMINATED WITH PHOSPHORUS, THEREBY FORMING SOLID POTASSIUM FLUOSILICATE, AND SEPARATING THE RESULTANT SOLID FLUOSILICATE SUBSTANTIALLY FREE OF PHOSPHORUS AND MAGNESIUM CONTAMINATION FROM THE RESULTING 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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |