Patent US2981601A successfully refreshed from Google Patents.
US2981601A
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Process for the treatment of silicofluoride compounds
Assignee: Kidde Process Corp
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Filing: 1957-07-22
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Granted: 1961-04-25
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Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Gustave E Kidde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191; C01B7/193
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A PROCESS FOR THE PRODUCTION OF VALUABLE PRODUCTS FROM SILIFLUORIDE COMPOUNDS, THE STEPS COMPRISING REACTING TOGETHER A SILICOFLUORIDE COMPOUND AND A SOLUBLE ACID SALT SELECTED FROM THE GROUP CONSISTING OF SULFATES, CHLORIDES AND NITRATES OF ALUMINUM AND IRON TO PRODUCE A MIXTURE INCLUDING SILICA AND A COMPLEX ACID SALT OF FLUORINE AND A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND IRON; SEPARATING THE SILICA FROM THE MIXTURE; AND TREATING THE SILICA-FREE MIXTURE TO OBTAIN HYDROGEN FLUORIDE THEREFROM.
Claim 2
Dependent Claim
80 words
IN A PROCESS FOR THE PRODUCTION OF VALUABLE PRODUCTS FROM SILIFLUORIDE COMPOUNDS, THE STEPS COMPRISING REACTING TOGETHER A SILICOFLUORIDE COMPOUND AND A SOLUBLE ACID SALT SELECTED FROM THE GROUP CONSISTING OF SULFATES, CHLORIDES AND NITRATES OF ALUMINUM AND IRON TO PRODUCE A MIXTURE INCLUDING SILICA AND A COMPLEX ACID SALT OF FLUORINE AND A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND IRON; SEPARATING THE SILICA FROM THE MIXTURE; AND TREATING THE SILICA-FREE MIXTURE TO OBTAIN HYDROGEN FLUORIDE THEREFROM.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |