| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_04650c4315071ee8af7d26e3441a53b1 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-85
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate |
1982-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1984-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b9aef64279ee1888b1718d6e3d78927b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fdb17b1e9c64abb67a11071bc03696f6 |
| publicationDate |
1984-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4439597-A |
| titleOfInvention |
Process for the preparation of polybutylene terephthalate |
| abstract |
In the two stage reaction of terephthalic acid with 1,4-butanediol to produce polybutylene terephthalate in which acid and diol are first subjected to catalytic esterification/oligomerization and the resulting products are thereafter subjected to catalytic polycondensation, the co-production of tetrahydrofuran is significantly reduced by conducting the polycondensation reaction prior to completion of the esterification/oligomerization reaction. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8168707-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6967235-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8791189-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6221279-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004236067-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6812321-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009181199-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8394915-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6472500-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009179035-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009221768-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4511708-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I423993-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8143367-B2 |
| priorityDate |
1980-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |