| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0e77f06144be4708a6ae75bd9fee56a4 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-00 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-22 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-00 |
| filingDate |
1990-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1991-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4ffbe5a69b3170e32d8eaca665ce29b4 |
| publicationDate |
1991-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5025090-A |
| titleOfInvention |
Decolorization of dihydroxydiphenyl sulfone |
| abstract |
Trivalent phosphorous compounds (e.g., phosphorous acid and dialkyl phosphites) if present in small amount during the reaction of phenol with a sulfonating agent or a phenol sulfonic acid yield a dihydroxydiphenyl sulfone product that is less colored. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5399772-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5777171-A |
| priorityDate |
1990-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |