US3695835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonium polyphosphate manufacture
Assignee: Endoscopic Technologies Inc
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Filing: 1970-05-06
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Granted: 1972-10-03
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Expires: 1990-05-06
Abstract
Abstract A METHOD IS DISCLOSED FOR FORMING AMMONIUM POLYPHOSPHATES HAVING SELF-SEQUESTERING PROPERTIES BY QUICKLY HEATING AND CONVERTING A STREAM CONTAINING AMMONIUM PHOSPHATE TO AMMONIUM POLYPHSPHATE. IN ONE EMBODIMENT, AMMONIA AND PHOSPHORIC ACID ARE COMINED IN A RESTRICTED REACTION ZONE SO AS TO FORM AMMONIUM PHOSPHATES, STEAM AND IN SOME INSTANCES FREE AMMONIA, AND ARE THEN SUBJECTED TO HOT GASES SO AS TO RAISE THE TEMPERATURE OF THE REACTION MASS TO ABOVE ABOUT 450*F. WHEREBY SAID AMMONIUM PHOSPHATES ARE CONVERTED TO AMMONIUM POLYPHOSPHATE.
Inventors
- 👤 Tommy Carter Kearns
- 👤 Yang Joo Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:17
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/28; C01B25/38; C01B25/40; C01B25/405
Claims Analysis
Total Claims: 0
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |