US2954286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate-containing complex fertilizer material production
Assignee: Fisons Ltd
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Filing: 1957-12-26
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Granted: 1960-09-27
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Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Bradley John Kenneth
- 👤 Brown Geoffrey George
- 👤 Sheldrick William Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:25
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR THE PRODUCTION OF A COMPLEX FERTILIZER WHICH COMPRISES REACTING TOGETHER POTASSIUM CHLORIDE AND NITRIC ACID OF A CONCENTRATION IN THE RANGE 50-95% BY WEIGHT, AT A TEMPERATURE OF THE ORDER OF 100*C., THE NITRIC ACID BEING EMPLOYED IN AMOUNT COMPRISING 10 TO 200% EXCESS OVER THE REQUIREMENT OF 4 MOLS OF NITRIC ACID PER 3 MOLS OF POTASSIUM CHLORIDE, REMOVING THE FORMED NITROSYL CHLORIDE AND CHLORIDE, TREATING THE LIQUID PRODUCT FREE FROM NITROSYL CHLORIDE AND CHLORINE WITH PHOSPHORIC ACID OF A CONCENTRATION IN THE RANGE 50-70% BY WEIGHT, AND TREATING THE RESULTING PRODUCT WITH AMMONIA, WITH VIGOROUS AGITATION.
Claim 2
Dependent Claim
101 words
A PROCESS FOR THE PRODUCTION OF A COMPLEX FERTILIZER WHICH COMPRISES REACTING TOGETHER POTASSIUM CHLORIDE AND NITRIC ACID OF A CONCENTRATION IN THE RANGE 50-95% BY WEIGHT, AT A TEMPERATURE OF THE ORDER OF 100*C., THE NITRIC ACID BEING EMPLOYED IN AMOUNT COMPRISING 10 TO 200% EXCESS OVER THE REQUIREMENT OF 4 MOLS OF NITRIC ACID PER 3 MOLS OF POTASSIUM CHLORIDE, REMOVING THE FORMED NITROSYL CHLORIDE AND CHLORIDE, TREATING THE LIQUID PRODUCT FREE FROM NITROSYL CHLORIDE AND CHLORINE WITH PHOSPHORIC ACID OF A CONCENTRATION IN THE RANGE 50-70% BY WEIGHT, AND TREATING THE RESULTING PRODUCT WITH AMMONIA, WITH VIGOROUS AGITATION.
References Cited (Backward Citations)
DE562634C
Cited
US2170843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |