US3022153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a stable liquid fertilizer from wet-process phosphoric acid
Assignee: Individual
•
Filing: 1958-12-08
•
Granted: 1962-02-20
•
Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Robert C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:51
CPC Classifications
C; C05; C05B; C05B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD OF PREPARING A STABLE SPRAYABLE FERTILIZER COMPOSITION ESSENTIALLY FREE OF INSOLUBLE PRECIPITATES INCLUDING THE STEPS OF ADDING UREA TO WET-PROCESS PHOSPHORIC ACID CONTAINING IMPURITIES SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM COMPOUNDS, AT LEAST AN EQUIIMOLECULAR AMOUNT OF UREA BEING ADDED BASED ON THE MOLES OF SAID IMPURITEIS PRESENT, TO FORM UNSTABLE UREAPHOSPHORIC ACID AND AMMONIATING SAID ACID AT A TEMPERATURE ABOVE ABOUT 65*C. UNTIL THE COMPOSITION REACHES A PH OF FROM ABOUT 7.5 TO ABOUT 8, THE NORMALLY INSOLUBLE PHOSPHATES SELECTED FROM THE GROUP CONSISTING OF IRON PHOSPHATE AND ALUMINUM PHOSPHATE PRESENT IN THE COMPOSITION AFTER AMMONIATION BEING FORMED INTO A SOLUBLE COMPLEX WITH THE UREA.
Claim 2
Independent Claim
111 words
A METHOD OF PREPARING A STABLE SPRAYABLE FERTILIZER COMPOSITION ESSENTIALLY FREE OF INSOLUBLE PRECIPITATES INCLUDING THE STEPS OF ADDING UREA TO WET-PROCESS PHOSPHORIC ACID CONTAINING IMPURITIES SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM COMPOUNDS, AT LEAST AN EQUIIMOLECULAR AMOUNT OF UREA BEING ADDED BASED ON THE MOLES OF SAID IMPURITEIS PRESENT, TO FORM UNSTABLE UREAPHOSPHORIC ACID AND AMMONIATING SAID ACID AT A TEMPERATURE ABOVE ABOUT 65*C. UNTIL THE COMPOSITION REACHES A PH OF FROM ABOUT 7.5 TO ABOUT 8, THE NORMALLY INSOLUBLE PHOSPHATES SELECTED FROM THE GROUP CONSISTING OF IRON PHOSPHATE AND ALUMINUM PHOSPHATE PRESENT IN THE COMPOSITION AFTER AMMONIATION BEING FORMED INTO A SOLUBLE COMPLEX WITH THE UREA.
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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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |