US2976140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing ammoniated phosphatic fertilizers
Assignee: Individual
•
Filing: 1955-02-18
•
Granted: 1961-03-21
•
Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 John N Carothers
- 👤 Jr Rudolph J Hurka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
CPC Classifications
C; C05; C05B; C05B1/00; C05B1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE PROCESS OF PRODUCING AMMONIATED PHOSPHATE IN WHICH SUBSTANTIALLY ALL OF THE P2O5 IS AVAILABLE FROM ACIDULATED PHOSPHATE ROCK IN THE PRESENCE OF FLUORINE REMAINING IN THE ROCK AFTER ACIDULATION WHICH COMPRISES, ACIDULATING THE ROCK WITH SULFURIC ACID IN THE PROPORTION OF 1.77 POUNDS OF 2.06 POUNDS H2SO4 TO EACH POUND OF P4O5 IN THE ROCK AND WITH SUFFICIENT WATER OF FROM A MOIST PRODUCT, ALLOWING THE ACIDULATED ROCK TO AGE WITHOUT SUBSTANTIALLY DRYING FOR AT LEAST A WEEK, WHEREBY IT WILL CONTAIN AFTER AGING IN EXCESS OF 6% MOISTURE, AND ADDING AMMONIA TO THE ACIDULATED ROCK TO PRODUCE A PRODUCT HAVING IN EXCESS OF 6.5 PARTS AMMONIA TO 20 PARTS P2O5 WHILE MAINTAINING THE TEMPERATURE DURING AMMONIATION BELOW 75*C.
Claim 2
Dependent Claim
120 words
THE PROCESS OF PRODUCING AMMONIATED PHOSPHATE IN WHICH SUBSTANTIALLY ALL OF THE P2O5 IS AVAILABLE FROM ACIDULATED PHOSPHATE ROCK IN THE PRESENCE OF FLUORINE REMAINING IN THE ROCK AFTER ACIDULATION WHICH COMPRISES, ACIDULATING THE ROCK WITH SULFURIC ACID IN THE PROPORTION OF 1.77 POUNDS OF 2.06 POUNDS H2SO4 TO EACH POUND OF P4O5 IN THE ROCK AND WITH SUFFICIENT WATER OF FROM A MOIST PRODUCT, ALLOWING THE ACIDULATED ROCK TO AGE WITHOUT SUBSTANTIALLY DRYING FOR AT LEAST A WEEK, WHEREBY IT WILL CONTAIN AFTER AGING IN EXCESS OF 6% MOISTURE, AND ADDING AMMONIA TO THE ACIDULATED ROCK TO PRODUCE A PRODUCT HAVING IN EXCESS OF 6.5 PARTS AMMONIA TO 20 PARTS P2O5 WHILE MAINTAINING THE TEMPERATURE DURING AMMONIATION BELOW 75*C.
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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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |