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US3231364A
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Fertilizer manufacture with reduced water content
Assignee: Fisons Fertilizers Ltd
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Filing: 1963-01-30
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Granted: 1966-01-25
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Booth Donald Harold
- 👤 Quinton Geoffrey Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:04
CPC Classifications
C; C05; C05B; C05B7/00; C05B1/00; C05B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR THE PRODUCTION OF COMPOUND FERTILIZERS WHICH COMPRISES AMMONIATING AN ACID MIXTURE CONSISTING OF A MIXTURE OF COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE, MONOAMMONIUM PHOSPHATE, NITRIC ACID AND PHOSPHORIC ACID, AND CONTAINING PHOSPHATE AND NITRATE ANIONS, HYDROGEN CATIONS, AMMONIUM CATIONS AND WATER AND REDUCING THE WATER CONTENT OF THE MIXTURE BY PASSING AN INERT GAS THROUGH THE MIXTURE WHEN, AS A SATURATED SOLUTION AT 20*C., IT HAS A PH OF AT LEAST 1.5, TO FORM A SUBSTANTIALLY HOMOGENEOUS LIQUID MELT COMPRISING AMMONIUM NITRATE, MONOAMMONIUM PHOSPHATE, CONDENSED PHOSPHATES AND UP TO 2% BY WEIGHT OF WATER BASED ON THE WEIGHT OF THE MELT AND THE TEMPERATURE OF THE MELT BEING LESS THAN 170*C., AND CONVERTING SAID MELT TO A GRANULAR FERTILIZER PRODUCT.
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE PRODUCTION OF COMPOUND FERTILIZERS WHICH COMPRISES AMMONIATING AN ACID MIXTURE CONSISTING OF A MIXTURE OF COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE, MONOAMMONIUM PHOSPHATE, NITRIC ACID AND PHOSPHORIC ACID, AND CONTAINING PHOSPHATE AND NITRATE ANIONS, HYDROGEN CATIONS, AMMONIUM CATIONS AND WATER AND REDUCING THE WATER CONTENT OF THE MIXTURE BY PASSING AN INERT GAS THROUGH THE MIXTURE WHEN, AS A SATURATED SOLUTION AT 20*C., IT HAS A PH OF AT LEAST 1.5, TO FORM A SUBSTANTIALLY HOMOGENEOUS LIQUID MELT COMPRISING AMMONIUM NITRATE, MONOAMMONIUM PHOSPHATE, CONDENSED PHOSPHATES AND UP TO 2% BY WEIGHT OF WATER BASED ON THE WEIGHT OF THE MELT AND THE TEMPERATURE OF THE MELT BEING LESS THAN 170*C., AND CONVERTING SAID MELT TO A GRANULAR FERTILIZER PRODUCT.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |