EP0443797A3
Optical disc having signal recording layer on each side and method for producing same
Abstract
A double-side optical disc formed by a pair of optical disc halves bonded together, and a process for producing the double-side optical disc. An adhesive is applied to the disc halves, which are then bonded together at an angle relative to each other in which the direction of the adhesive flow on one disc half will intersect the direction of the adhesive flow on the other disc half. In this manner, satisfactory flatness of the optical disc may be achieved without being affected by surface irregularities of the adhesive layer.

Term
Term ended
Projected expiry passed 18 February 2011, 15.6 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| EP0150829A1 | Cites | European Patent Office (EPO) | A | Search report |
| US4917751A | Cites | United States of America | AP | Search report |
17 members in 9 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 4170790 | Japan | – | |
| 4170790 | Japan | A | |
| 4170790 | Japan | A | |
| JP19900041707 | – | – | – |
Members17
| Document | Office | Kind | |
|---|---|---|---|
| CA2036715A1 | Canada | A1 | |
| EP0443797A2 | European Patent Office (EPO) | A2 | |
| AU7116191A | Australia | A | |
| JPH03245329A | Japan | A | |
| KR920000051A | Republic of Korea | A | |
| EP0443797A3This record | European Patent Office (EPO) | A3 | |
| AU637866B2 | Australia | B2 | |
| US5284538A | United States of America | A | |
| MY105384A | Malaysia | A | |
| US5378517A | United States of America | A | |
| EP0443797B1 | European Patent Office (EPO) | B1 | |
| AT129354T | Austria | T | |
| DE69113833D1 | Germany | D1 | |
| DE69113833T2 | Germany | T2 | |
| JP2808794B2 | Japan | B2 | |
| CA2036715C | Canada | C | |
| KR100232622B1 | Republic of Korea | B1 |
28 legal events, as 4 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 | |
| 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 | |
| Lapsed because of non-payment of the annual feeLapsedV1 | V1 | NL | |
| 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 | |
| Notification of lapseLapsedST | ST | FR | |
| 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 | |
| European patent in force as of 2002-01-01IF02 | IF02 | GB | |
| 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 | |
| Corresponds to:REF | REF | 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 | |
| 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
- 0443797
- Publication, DOCDB
- 0443797
- Publication, EPODOC
- EP0443797
- Application
- 301271
- Application, DOCDB
- 91301271
- Application, EPODOC
- EP19910301271
Titles3
- English
- Optical disc having signal recording layer on each side and method for producing same
- German
- Optische Platte mit einer Signalaufzeichnungsschicht auf jeder Seite und Verfahren zu seiner Herstellung
- French
- Disque optique ayant une couche pour enregistrer des signaux de chaque côté et son procédé de fabrication
Classification
- CPC, 13
- B29C65/521
- G11B7/24024
- B29C66/452
- B29C65/4815
- B29L2017/005
- B29C65/526
- G11B7/26
- B29C65/7847
- Y10S428/913
- B29C66/1122
- B29C66/71
- B29C66/8322
- Y10T156/1052
- IPC, 3
- B29C65 52
- G11B7 24024
- G11B7 26
Designated states5
- Contracting states, 5
- Austria
- Germany
- France
- United Kingdom
- Netherlands (Kingdom of the)