| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b82ca8449337edfa4140c8241d8241f4 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C70-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29D11-00028
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C43-206
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C43-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C70-84 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29L11-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29K105-32 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02C13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C70-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C70-84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C43-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C43-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C39-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02C7-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29D11-00 |
| filingDate |
1990-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dca261b35c4803612cbacaf5586d50ad |
| publicationDate |
1991-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0457855-A1 |
| titleOfInvention |
Method for forming plastic optical quality spectacle |
| abstract |
Multifocal or progressive plastic lenses are formed from preformed lenses (11) having predetermined lens corrections at the optical centers. A preformed lens is placed against a mold (13) so that the surfaces of the preformed lens and the mold form a cavity (14). A resin composition fills the cavity and is curved to form an optical segment (12). The cavity (14) is formed so that it corresponds to a desired change in curvature, so that the correction at the optical center is identical to the correction of the predetermined lens at the optical center of the preformed lens (11) . The preformed lens (11) can be deflected using a thin non-prescription carrier layer (16) for the multi-focus or progressive region of the finished lens. The methods allow deflection of lenses without using conventional linings. |
| priorityDate |
1989-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |