US3755546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removal of phosphates from solutions containing fluoride ions
Assignee: Honeywell International Inc
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Filing: 1971-08-31
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Granted: 1973-08-28
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Expires: 1991-08-31
Abstract
Abstract A PROCESS FOR REMOVING PHOSPHATE ION FROM FLUORIDE IONCONTAINING AQUEOUS SOLUTION IS PROVIDED WHICH COMPRISES ADDING A WATER-SOLUBLE BARIUM SALT IN THE PRESENCE OF SUFFICIENT AMMONIA TO AFFORD A PH OF AT LEAST 8.5 AND SEPARATING THE THEREBY PRECIPITATED BARIUM PHOSPHATE FROM THE SOLUTION.
Inventors
- 👤 B Lichstein
- 👤 C Woolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:47
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/328
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |