US3595613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phosphoric acid
Assignee: Arcadian Corp
•
Filing: 1968-07-01
•
Granted: 1971-07-27
•
Expires: 1988-07-01
Abstract
Abstract RECOVERING PHOSPHORIC ACID FROM A REACTION MIXTURE PRODUCED BY REACTING HYDROCHLORIC ACID WITH PHOSPHATE ROCK BY MIXING THE REACTION MIXTURE WITH A LOWER ALIPHATIC ALCOHOL TO FORM A FIRST AQUEOUS LAYER AND A FIRST ORGANIC LAYER WHICH CONTAINS THE PHOSPHORIC ACID. THE LAYERS ARE SEPARATED AND A WATER-SOLUBLE FLUORIDE COMPOUND IS ADDED TO THE FIRST ORGANIC LAYER. THE ORGANIC LAYER IS THEN WASHED WITH WATER TO FORM A SECOND AQUEOUS LAYER AND A SECOND ORGANIC LAYER AND THE AQUEOUS LAYER WHICH CONTAINS THE PHOSPHORIC ACID IS SEPARATED OUT.
Inventors
- 👤 William C Klingelhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:46
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488; C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |