US3562289A
Expired / Lapsed
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Chromatographic separation process by means of cellulose crystallite aggregates derivatives
Assignee: FMC Corp
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Filing: 1965-05-12
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Granted: 1971-02-09
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Expires: 1985-05-12
Abstract
Abstract WATER-INSOLUBLE DERIVATIVES OF CELLULOSE CRYSTALLITE AGGREGATES HAVING AN AVERAGE LEVEL-OFF D.P. OF 15 TO 375 AND HAVING ION-EXCHANGE FUNCTIONAL GROUPS ARE USED IN SEPARATING ALKALOIDS, AMINO GROUP-CONTAINING COMPOUNDS, LIPIDS, ORGANIC ACIDS, RACEMATES AND SUGARS FROM MIXTURES CONTAINING THE RESPECTIVE SUBSTANCES OR COMPOUNDS. A SOLUTION OF A MIXTURE CONTAINING THE RESPECTIVE SUBSTANCES IS BROUGHT INTO CONTACT WITH THE CELLULOSE CRYSTALLITE AGGREGATES DERIVATIVE AND THE SUBSTANCES ADSORBED BY THE DERIVATIVE, SUBSEQUENTLY RECOVERED BY ELUTION.
Inventors
- 👤 Orlando A Battista
- 👤 Charles J Boone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/025; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |