EP0335731A3
Multi-focal diffractive ophthalmic lenses
Abstract
A multifocal ophthalmic lens has optical power, at least a portion of the optical power being produced by diffraction. The lens has a plurality of diffractive zones including a circular central zone and a plurality of concentric annular zones. The central zone has a radius r₀ and the first annular zone has a radius r₁ where r₁² - r₀² is not equal to r₀².
Term
Term ended
Projected expiry passed 31 March 2009, 17.5 years ago.
- Priority
- Filed
- Published
- Projected expiry
- Today
1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| GB2139375A | Cites | United Kingdom | A | Search report |
| GB2185126A | Cites | United Kingdom | A | Search report |
| US4338005A | Cites | United States of America | AD | Search report |
21 members in 10 offices
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 176701 | United States of America | – | |
| 17670188 | United States of America | A | |
| US19880176701 | – | – | – |
Members21
| Document | Office | Kind | |
|---|---|---|---|
| EP0335731A2 | European Patent Office (EPO) | A2 | |
| AU3225789A | Australia | A | |
| BR8901513A | Brazil | A | |
| BR8901513A | Brazil | A | |
| KR890016407A | Republic of Korea | A | |
| JPH0228615A | Japan | A | |
| ES2012742A4 | Spain | A4 | |
| DE335731T1 | Germany | T1 | |
| EP0335731A3This record | European Patent Office (EPO) | A3 | |
| AU614346B2 | Australia | B2 | |
| US5076684A | United States of America | A | |
| US5116111A | United States of America | A | |
| US5129718A | United States of America | A | |
| CA1316728C | Canada | C | |
| MX171656B | Mexico | B | |
| EP0335731B1 | European Patent Office (EPO) | B1 | |
| DE68914015D1 | Germany | D1 | |
| ES2012742T3 | Spain | T3 | |
| DE68914015T2 | Germany | T2 | |
| KR0158673B1 | Republic of Korea | B1 | |
| JP3054419B2 | Japan | B2 |
39 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 | |
| Se: european patent has lapsedLapsedEUG | EUG | EP | |
| Nl: ceased due to reaching the maximum lifetime of a patentCeasedNLV7 | NLV7 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Announcement of lapse in spainLapsedFD2A | FD2A | ES | |
| Patent expired after termination of 20 yearsExpiredPE20 | PE20 | GB | |
| Patent ceasedCeasedPL | PL | CH | |
| 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 | |
| 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 | |
| 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 | |
| Name/firm changedPFA | PFA | CH | |
| European patent in force as of 2002-01-01IF02 | IF02 | GB | |
| No opposition filedOpposition26N | 26N | EP | |
| Se: european patent in force in swedenEAL | EAL | 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 | |
| Definitive protectionFG2A | FG2A | ES | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| It: translation for a ep patent filedITF | ITF | EP | |
| It: translation for a ep patent filedITF | ITF | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| De: translation of patent claimsDET | DET | EP | |
| Fr: translation of claims filedEL | EL | EP | |
| Request for examination filed17P | 17P | EP | |
| Nl: translation of patent claims filedTCNL | TCNL | EP | |
| It: translation for ep claims filedITCL | ITCL | 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
- 0335731
- Publication, DOCDB
- 0335731
- Publication, EPODOC
- EP0335731
- Application
- 303198
- Application, DOCDB
- 89303198
- Application, EPODOC
- EP19890303198
Titles3
- English
- Multi-focal diffractive ophthalmic lenses
- German
- Multifokale ophthalmische Beugungslinsen
- French
- Lentilles ophtalmiques multifocales diffractives
Classification
- CPC, 8
- G02C7/06
- A61F2/1618
- A61F2/1654
- G02B5/1876
- G02B5/1895
- G02C7/042
- G02C7/044
- G02C2202/20
- IPC, 4
- A61F2 16
- G02B5 18
- G02C7 04
- G02C7 06
Designated states9
- Contracting states, 9
- Switzerland
- Germany
- Spain
- France
- United Kingdom
- Italy
- Liechtenstein
- Netherlands (Kingdom of the)
- Sweden