US3221008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange process for the recovery of ionic organic substances
Assignee: Merck and Co Inc
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Filing: 1962-01-30
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Granted: 1965-11-30
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Expires: 1982-01-30
Abstract
No abstract record available.
Inventors
- 👤 Frank J Wolf
- 👤 Putter Irving
- 👤 Jr George V Downing
- 👤 Gillin James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:27
CPC Classifications
C; C12; C12P; C12P27/00; B; B01; B01J; B01J47/00; B01J47/014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR RECOVERING AN IONIC ORGANIC SUBSTANCE FROM AN ION EXCHANGE RESIN ON WHICH SAID SUBSTANCE HAS BEEN PREVIOUSLY ADSORBED THE IMPROVEMENT WHICH COMPRISES ELUTING SAID RESIN CONTAINING SAID IONIC ORGANIC SUBSTANCE WITH AN ELUTRIENT MIXTURE COMPRISING AT LEAST 50% BY VOLUME OF A WATER-MISCIBLE ORGANIC SOLVENT, FROM ABOUT 0.1% TO ABOUT 15% BY WEIGHT OF AN IONIZABLE SALT, AND WATER IN AN AMOUNT SUFFICIENT TO SOLUBILIZE SAID SALT; SAID SALT BEING SOLUBLE IN SAID SOLVENT-WATER MIXTURE AND SAID ELUTRIENT MIXTURE ALSO BEING A SOLVENT FOR SAID IONIC ORGANIC SUBSTANCE.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR RECOVERING AN IONIC ORGANIC SUBSTANCE FROM AN ION EXCHANGE RESIN ON WHICH SAID SUBSTANCE HAS BEEN PREVIOUSLY ADSORBED THE IMPROVEMENT WHICH COMPRISES ELUTING SAID RESIN CONTAINING SAID IONIC ORGANIC SUBSTANCE WITH AN ELUTRIENT MIXTURE COMPRISING AT LEAST 50% BY VOLUME OF A WATER-MISCIBLE ORGANIC SOLVENT, FROM ABOUT 0.1% TO ABOUT 15% BY WEIGHT OF AN IONIZABLE SALT, AND WATER IN AN AMOUNT SUFFICIENT TO SOLUBILIZE SAID SALT; SAID SALT BEING SOLUBLE IN SAID SOLVENT-WATER MIXTURE AND SAID ELUTRIENT MIXTURE ALSO BEING A SOLVENT FOR SAID IONIC ORGANIC SUBSTANCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |