US3186809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of mineral acids using dodecylphenol
Assignee: General Mills Inc
•
Filing: 1961-08-10
•
Granted: 1965-06-01
•
Expires: 1981-08-10
Abstract
No abstract record available.
Inventors
- 👤 Maurice M Kreevoy
- 👤 Le Roy T Ditsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:11
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/38; C01B21/46; C01B11/00; C01B11/16; C01B17/00; C01B17/69; C01B17/74; C01B7/00; C01B7/01; C01B7/07; C01B7/0706; C01B7/0731; C01B7/0737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A PROCESS FOR RECOVERING INORGANIC MINERAL ACIDS FROM AN AQUEOUS SOLUTION THEREOF WHEREIN THE SAID AQUEOUS SOLUTION IS CONTACTED WITH A WATER IMMISCIBLE ORGANIC PHASE COMPRISING AN AMINE EXTRACTANT DISSOLVED IN A NONREACTIVE ORGANIC SOLVENT, THE AQUEOUS AND ORGANIC PHASES ARE SEPARATED AND THE SAID ACIDS ARE RECOVERED FROM THE ORGANIC PHASE, THE IMPROVEMENT WHICH COMPRISES ADDING DODECYLPHENOL TO THE WATER IMMISICIBLE ORGANIC PHASE CONTAINING THE AMINE EXTRACTANT PRIOR TO THE CONTACTING OF SAID ORGANIC PHASE WITH THE SAID AQUEOUS SOLUTION OF THE INORGANIC MINERAL ACIDS.
Claim 2
Dependent Claim
87 words
IN A PROCESS FOR RECOVERING INORGANIC MINERAL ACIDS FROM AN AQUEOUS SOLUTION THEREOF WHEREIN THE SAID AQUEOUS SOLUTION IS CONTACTED WITH A WATER IMMISCIBLE ORGANIC PHASE COMPRISING AN AMINE EXTRACTANT DISSOLVED IN A NONREACTIVE ORGANIC SOLVENT, THE AQUEOUS AND ORGANIC PHASES ARE SEPARATED AND THE SAID ACIDS ARE RECOVERED FROM THE ORGANIC PHASE, THE IMPROVEMENT WHICH COMPRISES ADDING DODECYLPHENOL TO THE WATER IMMISICIBLE ORGANIC PHASE CONTAINING THE AMINE EXTRACTANT PRIOR TO THE CONTACTING OF SAID ORGANIC PHASE WITH THE SAID AQUEOUS SOLUTION OF THE INORGANIC MINERAL ACIDS.
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) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |