US3775315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of ammonium polyphosphate
Assignee: Solvay Solutions UK Ltd
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Filing: 1972-02-18
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Granted: 1973-11-27
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Expires: 1992-02-18
Abstract
Abstract MODIFIED AMMONIUM POLYPHOSPHATES CONTAINING A DETERGENT (WATER-ACTIVE AGENT) CONSTITUENT ARE PREPARED BY REACTING AN AMMONIATING AGENT SUCH AS UREA OR THIOUREA WITH A PHOSPHORIC ACID REAGENT IN THE PESENCE OF FROM 1 TO 35% BY WEIGHT BASED ON THE TOTAL WEIGHT OF P2O5 IN THE REACTION MIXTURE OF A WETTING AGENT. THE PRODUCT MAY BE OBTAINED IN SOLUBLE FORM HAVING BUILT-IN DETERGENCY FOR USE IN DETERGENTS OR LIQUID FERTILIZERS, OR IN A WATER-INSOLUBLE FORM HAVING FIRE-RETARDANT PROPERTIES SUITABLE FOR INTUMESCENT PAINTS AND FIRE EXTINGUISHING COMPOSITIONS.
Inventors
- 👤 R Smith
- 👤 R Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:37
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/06; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; C01B25/38; C01B25/40; C01B25/405
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |