| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9b0f615b92cd3bb66e8ea41483a2dc63 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C43-135
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-20 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-20 |
| filingDate |
1992-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1993-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf28f27ac5ce8db9cb089df2ef638857
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2aaa78b75dae5ce46663dec5680b6fe
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5a6a94064624817fc1c11f7098b0d718 |
| publicationDate |
1993-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5210283-A |
| titleOfInvention |
Synthesis of tetrahydrofuran polymers using calcined silica-alumina or beaching earth catalysts |
| abstract |
Tetrahydrofuran is polymerized in the presence of a carboxylic acid anhydride and a solid acid catalyst that has been calcined at a temperature greater than about 600° C. Calcined bleaching earth catalysts give THF polymer products having a narrow molecular weight distribution; calcining amorphous silica-aluminas improves their activity toward THF polymerization. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6271413-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5635585-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6069226-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5770678-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5773648-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9633232-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5344964-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9623833-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19513493-C1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4421788-C2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19513493-C2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6362312-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0020485-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6559278-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5541346-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9609335-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9405719-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5886138-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004117937-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4421788-A1 |
| priorityDate |
1992-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |