| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0d78cd2835221849f6a74e6349185819 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-23 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-23 |
| filingDate |
1981-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1983-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ed87966b797ccf4e3259c109ce553f9 |
| publicationDate |
1983-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4415720-A |
| titleOfInvention |
Production of aromatic polysulphones |
| abstract |
Aromatic polysulphones are prepared by the reaction under substantially anhydrous conditions in the presence of a fluoroalkane sulphonic acid, particularly trifluoromethane sulphonic acid or difluoromethane sulphonic acid, of the reactants selected from the following class: (a) an aromatic compound of specified formula (such as diphenyl ether or diphenyl) and a sulphonating agent; (b) an aryl monosulphonic acid of specified formula (such as diphenyl ether-4-sulphonic acid or diphenyl-4-sulphonic acid); and (c) an aryl disulphonic acid of specified formula (such as diphenyl ether-4,4'-disulphonic acid or diphenyl-4,4'-disulphonic acid) and an aromatic compound as defined in (a). |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113278150-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004009573-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7192939-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4614767-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6548622-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113278150-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4536365-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4820792-A |
| priorityDate |
1980-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |