| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_572ab3dc169a753db545ebb270bf4e36 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-567 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-567
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 |
| filingDate |
1988-08-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_07502f62b3d7e0e7fa04ea44213bea18 |
| publicationDate |
1990-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0377637-A1 |
| titleOfInvention |
Process for the preparation of oxy-diphthalic anhydrides |
| abstract |
Oxy-diphthalic anhydrides are prepared by reacting a halophthalic anhydride with an hydroxyphthalic nanhydride in na polar aprotic solvent and in the presence of an alkali metal compound such as KF, CsF, or K₂CO₃. |
| priorityDate |
1987-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |