Patent US2799569A successfully refreshed from Google Patents.
US2799569A
Expired / Lapsed
US
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Ammonium phosphate fertilizers
Assignee: Union Oil Company of California
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Filing: 1954-11-29
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Granted: 1957-07-16
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 John D Wordie
- 👤 Davis A Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:32
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE PROCESS OF PREPARING AN AQUEOUS AMMONIUM PHOSPHATE PRODUCT WHICH COMPRISES: (1) INTRODUCING INTO A REACTION ZONE: (A) CRUDE WET PROCESS PHOSPHORIC ACID CONTAINING NORMALLY INCIDERNT IMPURITIES WHICH PRECIPITATES AS GELATINOUS SOLIDS UPON TREATING THE ACID WITH AMMONIA, (B) AMMONIA, (C) WATER, AND (D) A RECYCLED PORTION OF THE REACTION PRODUCT, THE AMOUNT OF AMMONIA BEING SUCH THAT THE REACTION PRODUCT WHICH IS SUBSEQUENTLY WITHDRAWN FROM THE REACTION ZONE HAS A PH VALUE BETWEEN ABOUT 6.3 AND ABOUT 6.7 AND THE AMOUNT OF WTER BEING SUCH THAT THE TOTAL P2O5 CONCENTRATION IN THE REACTION ZONE IS BETWEEN ABOUT 20 AND ABOUT 30 PERCENT BY WEIGHT; (2)
Claim 2
Dependent Claim
106 words
THE PROCESS OF PREPARING AN AQUEOUS AMMONIUM PHOSPHATE PRODUCT WHICH COMPRISES: (1) INTRODUCING INTO A REACTION ZONE: (A) CRUDE WET PROCESS PHOSPHORIC ACID CONTAINING NORMALLY INCIDERNT IMPURITIES WHICH PRECIPITATES AS GELATINOUS SOLIDS UPON TREATING THE ACID WITH AMMONIA, (B) AMMONIA, (C) WATER, AND (D) A RECYCLED PORTION OF THE REACTION PRODUCT, THE AMOUNT OF AMMONIA BEING SUCH THAT THE REACTION PRODUCT WHICH IS SUBSEQUENTLY WITHDRAWN FROM THE REACTION ZONE HAS A PH VALUE BETWEEN ABOUT 6.3 AND ABOUT 6.7 AND THE AMOUNT OF WTER BEING SUCH THAT THE TOTAL P2O5 CONCENTRATION IN THE REACTION ZONE IS BETWEEN ABOUT 20 AND ABOUT 30 PERCENT BY WEIGHT; (2)
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |