US2861948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing phenols from aqueous solutions by sorption on ion exchange resins and alcohol elutriation thereform
Assignee: Dow Chemical Co
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Filing: 1953-08-12
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Granted: 1958-11-25
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Expires: 1973-08-12
Abstract
No abstract record available.
Inventors
- 👤 Mckellar Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:40
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/04; B01J41/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR REMOVING A PHENOL FROM AN AQUEOUS SOLUTION, WHICH COMPRISES CONTACTING AN AQUEOUS SOLUTION CONTAINING A DISSOLVED PHENOL AS SOLUTE WITH A SALT FORM OF A STRONGLY BASIC QUATERNARY AMMONIUM ANION EXCHANGE RESIN, WHEREBY THE PHENOL SOLUTE IS SORBED BY THE RESIN AND IS REMOVED FROM THE SOLUTION, SEPERATING THE SOLUTION AND THE RESIN AND WASHING THE RESIN WITH A WATER-MISCIBLE PHENOL IS DISPLACED BY THE ALCOHOL AND IS REMOVED FROM
Claim 2
Dependent Claim
73 words
A PROCESS FOR REMOVING A PHENOL FROM AN AQUEOUS SOLUTION, WHICH COMPRISES CONTACTING AN AQUEOUS SOLUTION CONTAINING A DISSOLVED PHENOL AS SOLUTE WITH A SALT FORM OF A STRONGLY BASIC QUATERNARY AMMONIUM ANION EXCHANGE RESIN, WHEREBY THE PHENOL SOLUTE IS SORBED BY THE RESIN AND IS REMOVED FROM THE SOLUTION, SEPERATING THE SOLUTION AND THE RESIN AND WASHING THE RESIN WITH A WATER-MISCIBLE PHENOL IS DISPLACED BY THE ALCOHOL AND IS REMOVED FROM
References Cited (Backward Citations)
US2521664A
Cited
US2591573A
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US2614099A
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US2543666A
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US2697724A
Cited
US2697725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |