Composite materials comprising porous, hollow particles, preparation and use thereof
Abstract
The present invention relates to materials and more particularly to composite materials in which a selected substance is supported by a support material. A composite material in accordance with the present invention comprises porous hollow particles of an inorganic material in which there is supported a selected substance (such as chromagraphic organic gel, or a liquid for use in two-phase separation processes). The porous hollow particles may be formed from, for example, a material such as kieselguhr and/or an inorganic oxide. The porous hollow particles may be formed by coating a fugitive core material (e.g. organic beads) with inorganic material and heating to remove the fugitive core material.
Term
Term ended
Projected expiry passed 18 December 2004, 21.8 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| EP0048110A2 | Cites | European Patent Office (EPO) | A | Search report |
| EP0089425A1 | Cites | European Patent Office (EPO) | Y | Search report |
| GB1602432A | Cites | United Kingdom | YD | Search report |
| FR2172755A1 | Cites | France | A | Search report |
| US4039480A | Cites | United States of America | A | Search report |
4 priority claims, no other members on record
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 8333794 | United Kingdom | A | |
| 8333794 | United Kingdom | – | |
| 8333794 | – | – | – |
| GB19830033794 | – | – | – |
19 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Se: european patent has lapsedLapsedEUG | EUG | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | |
| Nl: lapsed or anulled due to non-payment of the annual feeLapsedNLV4 | NLV4 | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | |
| No opposition filedOpposition26N | 26N | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | |
| Corresponds to:REF | REF | |
| Designated contracting statesAK | AK | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | |
| First examination report despatched17Q | 17Q | |
| Request for examination filed17P | 17P | |
| Designated contracting statesAK | AK | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | |
| Designated contracting statesAK | AK | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI |
Numbers
- Publication
- 0154751
- Publication, DOCDB
- 0154751
- Publication, EPODOC
- EP0154751
- Application
- 84308869
- Application, DOCDB
- 84308869
- Application, EPODOC
- EP19840308869
Titles3
- English
- Composite materials comprising porous, hollow particles, preparation and use thereof
- French
- Materiaux composites comprenant des particules poreuses creuses, leur préparation et utilisation
- German
- Verbundene Materien bestehend aus porösen, hohlen Teilchen, Herstellung und Verwendung derselben
Classification
- CPC, 4
- B01J20/28021
- B01J20/14
- B01J20/28047
- Y10T428/2989
- IPC, 4
- B01J20 281
- B01J13 02
- B01J20 28
- G01N30 88
Designated states3
- Contracting states, 3
- Germany
- Netherlands (Kingdom of the)
- Sweden