EP1544256A3
Aluminium oxide coated titanium dioxide particles and methods of preparing the same in presence of a densifying agent
Abstract
The invention is directed to a method for reducing the chemical activity and photo activity of titanium dioxide nanoparticles comprising adding a densifying agent, such as citric acid, to an aqueous slurry of the titanium dioxide nanoparticles; treating the aqueous slurry with a source of alumina, such as a solution of sodium aluminate, to form alumina- treated titanium dioxide nanoparticles. In one embodiment the particles are treated with a source of silica, such as a solution of sodium silicate. The nanoparticles of this invention can also be treated with a source of silica and a source of alumina. The treated nanoparticles can be silanized. The titanium dioxide nanoparticles described herein are useful in cosmetic, coating and thermoplastic compositions.
Term
Term ended
Projected expiry passed 16 December 2024, 1.8 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP0244180A1 | Cites | European Patent Office (EPO) | X | Search report | 1,6,7,13-16 |
| US2003089278A1 | Cites | United States of America | Y | Search report | 1-3,5-7,9,13,16,4,8 |
| US4199370A | Cites | United States of America | Y | Search report | 4,8 |
| US5451390A | Cites | United States of America | DY | Search report | 1-3,5-7,9,13,16 |
| WO9322386A1 | Cites | World Intellectual Property Organization (WIPO) | X | Search report | 1,5,7,13,14,16 |
9 members in 5 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 737357 | United States of America | – | |
| 73735703 | United States of America | A | |
| 737357 | – | – | – |
| US20030737357 | – | – | – |
Members9
| Document | Office | Kind | |
|---|---|---|---|
| CA2490162A1 | Canada | A1 | |
| US2005129634A1 | United States of America | A1 | |
| EP1544256A2 | European Patent Office (EPO) | A2 | |
| US2005135994A1 | United States of America | A1 | |
| JP2005220008A | Japan | A | |
| EP1544256A3This record | European Patent Office (EPO) | A3 | |
| US2008299056A1 | United States of America | A1 | |
| EP1544256B1 | European Patent Office (EPO) | B1 | |
| DE602004029641D1 | Germany | D1 |
46 legal events, as 5 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Patent revokedRevoked27W | 27W | EP | |
| Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting stateRevokedGBPR | GBPR | EP | |
| Patent revokedRevokedORIGINAL CODE: 0009271RDAG | RDAG | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: PATENT REVOKEDSTAA | STAA | EP | |
| Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119 | R119 | DE | |
| Communication despatched that patent is revokedRevokedORIGINAL CODE: EPIDOSNREV1RDAF | RDAF | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Reply to examination report in opposition receivedOppositionORIGINAL CODE: EPIDOSNORE3PLBC | PLBC | EP | |
| Information provided on ipc code assigned after grantRIC2 | RIC2 | EP | |
| Information provided on ipc code assigned after grantRIC2 | RIC2 | EP | |
| Information provided on ipc code assigned after grantRIC2 | RIC2 | EP | |
| Information provided on ipc code assigned after grantRIC2 | RIC2 | EP | |
| Information provided on ipc code assigned after grantRIC2 | RIC2 | EP | |
| Information provided on ipc code assigned after grantRIC2 | RIC2 | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Examination report in opposition despatched + time limitOppositionORIGINAL CODE: EPIDOSNORE2PLAY | PLAY | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Reply of patent proprietor to notice(s) of opposition receivedOppositionORIGINAL CODE: EPIDOSNOBS3PLBB | PLBB | EP | |
| Information modified related to communication of a notice of opposition and request to file observations + time limitOppositionORIGINAL CODE: EPIDOSCOBS2PLAF | PLAF | EP | |
| Information modified related to communication of a notice of opposition and request to file observations + time limitOppositionORIGINAL CODE: EPIDOSCOBS2PLAF | PLAF | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Information modified related to communication of a notice of opposition and request to file observations + time limitOppositionORIGINAL CODE: EPIDOSCOBS2PLAF | PLAF | EP | |
| Opposition filed against patentOppositionR026 | R026 | DE | |
| Opposition filedOpposition26 | 26 | EP | |
| Notice of opposition and request to file observation + time limit sentOppositionORIGINAL CODE: EPIDOSNOBS2PLAX | PLAX | EP | |
| Opposition filedOppositionORIGINAL CODE: 0009260PLBI | PLBI | EP | |
| 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 | |
| Discontinued in the netherlands as no translation has been filedVDEP | VDEP | NL | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| European patent grantedGrantedFG4D | FG4D | GB | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS | GRAS | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP | GRAP | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Designation fees paidAKX | AKX | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAX | AX | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Request for extension of the european patentAX | AX | 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
- 1544256
- Publication, DOCDB
- 1544256
- Publication, EPODOC
- EP1544256
- Application
- 4257867
- Application, DOCDB
- 04257867
- Application, EPODOC
- EP20040257867
Titles3
- German
- Aluminiumoxidbeschichtete Titandioxidpartikel und Verfahren zu deren Herstellung unter Verwendung von verdichtenden Agentien
- English
- Aluminium oxide coated titanium dioxide particles and methods of preparing the same in presence of a densifying agent
- French
- Particules d'oxyde de titane recouverts d'oxyde d'aluminium et leurs procédés de préparation utilisant un agent densifiant
Classification
- CPC, 13
- B82Y30/00
- A61K8/02
- A61K8/29
- A61K2800/413
- A61Q17/04
- B82Y5/00
- C01P2004/64
- C01P2006/60
- C01P2006/64
- C09C1/3661
- C09C1/3684
- C09C1/3692
- Y10T428/2993
- IPC, 8
- C09C1 36
- B82B3 00
- A61K8 02
- A61K8 29
- A61Q17 04
- C01G23 047
- C08K9 02
- C08L101 00
Designated states36
- Contracting states, 30
- Austria
- Belgium
- Bulgaria
- Switzerland
- Cyprus
- Czechia
- Germany
- Denmark
- Estonia
- Spain
- Finland
- France
- United Kingdom
- Greece
- Hungary
- Ireland
- Iceland
- Italy
- Liechtenstein
- Lithuania
- Luxembourg
- Monaco
- Netherlands (Kingdom of the)
- Poland
and 6 moreShow fewer
- Portugal
- Romania
- Sweden
- Slovenia
- Slovakia
- Türkiye
- Extension states, 6
- Albania
- Bosnia and Herzegovina
- Croatia
- Latvia
- North Macedonia
- Yugoslavia, later Serbia and Montenegro (until 2006)