US3711269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing liquid fertilizer
Assignee: Freeport Mcmoran Resource Partners Ltd
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Filing: 1970-09-17
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Granted: 1973-01-16
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Expires: 1990-09-17
Abstract
Abstract A CLEAR LIQUID POTASSIUM AMMONIUM PHOSPHATE FERTILIZER OR RELATIVELY HIGH POTASSIUM CONTENT IS MANUFACTURED BY AMMONIATING A POTASSIUM ACID PHOSPHATE SOLUTION TO A SPECIFIC RATIO AND THEN FILTERING THE AMMONIATED SOLUTION AT A TEMPERATURE WITHIN A VERY NARROW RANGE SO AS TO REMOVE PRECIPITATED SOLIDS. BY ADHERING TO THE PREFERRED LIMITATIONS OF COMPOSITION AND TEMPERATURE THE PRODUCTION OF UNSTABLE TRIAMMONIUM PHOSPHATE AS A BYPRODUCT IS AVOIDED AND LIQUID FERTILIZER WITH P2O5 TO K2O WEIGHT RATIOS OF ABOUT 1 TO 1.5 MAY BE OBTAINED.
Inventors
- 👤 W Curless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:45
CPC Classifications
C; C05; C05B; C05B7/00; C05G; C05G5/00; C05G5/20; C05G5/23
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |