EP0256293A3
Porous cross-linked polyvinyl alcohol particles, process for producing the same, and separating agent composed of the same
Abstract
Porous cross-linked polyvinyl alcohol particles used for a chromatographic medium are prepared by: dispersing an aqueous solution of a mixture of polyvinyl alcohol and a salt in an organic solvent; allowing a gel to form spontaneously from the dispersion; and reacting the gel with a cross-linking agent.
Term
Term ended
Projected expiry passed 8 July 2007, 19.2 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| US4104208A | Cites | United States of America | A | Search report |
10 members in 6 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 16172686 | Japan | – | |
| 16172686 | Japan | A | |
| 16172686 | – | – | – |
| JP19860161726 | – | – | – |
Members10
| Document | Office | Kind | |
|---|---|---|---|
| AU7539387A | Australia | A | |
| JPS6317904A | Japan | A | |
| EP0256293A2 | European Patent Office (EPO) | A2 | |
| EP0256293A3This record | European Patent Office (EPO) | A3 | |
| NZ220992A | New Zealand | A | |
| US4863972A | United States of America | A | |
| AU598830B2 | Australia | B2 | |
| EP0256293B1 | European Patent Office (EPO) | B1 | |
| DE3779513D1 | Germany | D1 | |
| DE3779513T2 | Germany | T2 |
26 legal events, as 3 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Notification of lapseLapsedST | ST | FR | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Patent ceasedCeasedPL | PL | CH | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Party data changed (applicant data changed or rights of an application transferred)RAP1 | RAP1 | EP | |
| Designated contracting statesAK | AK | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0256293
- Publication, DOCDB
- 0256293
- Publication, EPODOC
- EP0256293
- Application
- 87109862
- Application, DOCDB
- 87109862
- Application, EPODOC
- EP19870109862
Titles3
- English
- Process for producing porous cross-linked polyvinyl alcohol particles
- German
- Verfahren zur Herstellung von porösen vernetzter Polyvinylalkohol-Partikeln
- French
- Procédé de préparation des particules poreuses d'alcool de polyvinyle réticulé
Classification
- CPC, 10
- C08J9/283
- B01D15/327
- B01D15/34
- B01D15/361
- B01D15/3804
- B01J20/26
- B01J20/261
- C08J3/16
- B01J20/267
- C08J2329/04
- IPC, 11
- C08F8 00
- B01D15 08
- B01J20 26
- B01J20 281
- B01J20 285
- C08F16 02
- C08F16 06
- C08F16 38
- C08J3 16
- C08J9 28
- G01N30 88
Designated states5
- Contracting states, 5
- Switzerland
- Germany
- France
- United Kingdom
- Liechtenstein