| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be055db3c1a09879df07379ba969e223 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S430-163
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S430-146
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-2531 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K9-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-244
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D491-10 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K9-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-244
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D491-107
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D491-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-685 |
| filingDate |
1991-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a1d9779847d1631fbcf6c0b3022107d8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_26860ccb970a00dfc7dc7ef9352a8d17 |
| publicationDate |
1992-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0483542-A1 |
| titleOfInvention |
A photochromic material and an optical storage medium using the same |
| abstract |
The present invention provides a photochromic material which comprises a spiropyran compound of formula (I):n n wherein R¹ and R² are independently alkyl groups each containing 1 to 30 carbon atoms and Y is a halogen. nThe photochromic material possesses absorption sensitivity at wavelengths in the length region of about 700 nm which is the oscillation range of a semiconductor laser device, and possesses higher stability compared with conventional one when it becomes a colored form. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106349146-A |
| priorityDate |
1990-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |