| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B25-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B25-00 |
| filingDate |
1969-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b152927907d6cc14776724a5a8801dc7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9cac3c4bf7e1cb30c6e24059a5f4ea7 |
| publicationDate |
1971-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CH-513861-A |
| titleOfInvention |
Process for the preparation of pure 4-bromo-3-hydroxy-quinophthalone |
| abstract |
Cpds:- is prepd. by reacting 3-hydroxyquinophthalone with Br2 in H2SO4 of 80-100% strength at 0-40 degrees C (pref. 20-40 degrees C). The cpd. is a known dye. No. purification is necessary after isolation by pouring into ice water, filtering, washing and drying. |
| priorityDate |
1969-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |