| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4976a2965a6f1f78fd131ea1cd31d5ef |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B25-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D215-50 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D215-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B25-00 |
| filingDate |
1971-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1975-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_01794331d3292fa6cd4ceedbff8466dc |
| publicationDate |
1975-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3872131-A |
| titleOfInvention |
Method of preparing quinophthalone dyes |
| abstract |
Quinophthalone dyes are prepared by condensation of 2-methyl-3hydroxycinchoninic acids with aryl polycarboxylic acids, their anhydrides or mixtures thereof in the presence of N-lower alkyl pyrrolidones as solvents for the reaction. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4396768-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4101551-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6121452-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5468862-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102295837-A |
| priorityDate |
1971-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |