US3333921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydrous ammonium polyphosphate process
Assignee: Olin Corp
•
Filing: 1963-12-06
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Granted: 1967-08-01
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Expires: 1983-12-06
Abstract
No abstract record available.
Inventors
- 👤 Karl O Knollmueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:23
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; C01B25/38; C01B25/40; C01B25/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR PREPARING ANHYDROUS AMMINIUM POLYPHOSPHATE HAVING AN AVERAGE CHAIN LENGTH OF AT LEST SIX RECURRING -(NH4PO3)- UNITS WHICH COMPRISES PROVIDING A MIXTURE OF UREA AND AMMONIUM PHOSPHATE, SAID PHOSPHATE BEING UTILIZED IN AN AMOUNT OF FROM 1.0 TO 1.2 MOLES PER MOLE OF UREA IN SAID MIXTURE, HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 130*-200*C. UNDER REDUCED PRESSURE, REMOVING EVOLVED GASES FROM THE REACTION MIXTURE AND RECOVERING THE SOLID POLYPHOSPHATE PRODUCT.
Claim 2
Dependent Claim
74 words
A PROCESS FOR PREPARING ANHYDROUS AMMINIUM POLYPHOSPHATE HAVING AN AVERAGE CHAIN LENGTH OF AT LEST SIX RECURRING -(NH4PO3)- UNITS WHICH COMPRISES PROVIDING A MIXTURE OF UREA AND AMMONIUM PHOSPHATE, SAID PHOSPHATE BEING UTILIZED IN AN AMOUNT OF FROM 1.0 TO 1.2 MOLES PER MOLE OF UREA IN SAID MIXTURE, HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 130*-200*C. UNDER REDUCED PRESSURE, REMOVING EVOLVED GASES FROM THE REACTION MIXTURE AND RECOVERING THE SOLID POLYPHOSPHATE PRODUCT.
References Cited (Backward Citations)
CH321212A
Cited
US2781281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |