Patent US3586626A successfully refreshed from Google Patents.
US3586626A
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Gel chromatography process
Assignee: Merck KGaA
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Filing: 1967-03-27
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Granted: 1971-06-22
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Expires: 1987-03-27
Abstract
Abstract NOVEL CHROMATOGRAPHIC-GELS ARE PRODUCED BY COPOLYMERIZATION, WITH SIMULTANEOUS OR SUBSEQUENT CROSS-LINKING, OF VINYL ESTERS OR VINYLENE CARBONATES CONTAINING UP TO 20 CARBON ATOMS WITH ONE OR MORE CROSS-LNKABLE VINYL COMPOUNDS SUCH AS DIVINYL OR DIALLYL ESTERS OF DICARBOXYLIC ACIDS, EPOXY COMPOUNDS, DIVINYL ETHERS OF ALKANE DIOLS AND OTHER WELL-KNOWN CROSS-LINKABLE VINYL COMPOUNDS. THE RESULTANT GELS CAN BE PARTIALLY OR COMPLETELY SAPONIFIED AND THEN EMPLOYED IN THE SEPARATION OF SUBSTANCES WITH VARYING MOLECULAR WEIGHTS EMPLOYING KNOWN CHROMATOGRAPHIC TECHNIQUES.
Inventors
- 👤 Walter Heitz
- 👤 Karl-Ludwig Platt
- 👤 Werner Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:34
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/291; C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; C08F8/00; C08F8/12; C08J; C08J9/00; C08J9/28; C08J9/286; B01J2220/00; B01J2220/50; B01J2220/54; C08F2810/00; C08F2810/20; C08J2331/00
Claims Analysis
Total Claims: 0
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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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |