Patent US3667904A successfully refreshed from Google Patents.
US3667904A
Expired / Lapsed
US
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Process for the separation of mixtures of phosphoric and nitric acid
Assignee: Azote et Produits Chimiques SA
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Filing: 1970-04-13
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Granted: 1972-06-06
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Expires: 1990-04-13
Abstract
Abstract THIS INVENTION IS DIRECTED TO A PROCESS FOR THE PREPARATION OF MONOAMMONIUM PHOSPHATE BY AMMONIATION OF MIXTURES OF PHOSPHORIC AND NITRIC ACIDS IN THE PRESENCE OF AT LEAST PARTIALLY WATER-MISCIBLE C1 TO C8 ALKANOL CHARACTERIZED IN THAT THE ALCOHOLIC SOLUTION TO BE AMMONIATED CONTAINS 16 TO 8% OF WATER.
Inventors
- 👤 Andre Roche
- 👤 Robert Amanrich
- 👤 Gilbert Cousserans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:00
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/405; C01B25/28; C01C; C01C1/00; C01C1/18; C05; C05B; C05B7/00
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |