| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_230c5c9d495e3bf392ef2b8098e51921 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1071
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1064 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate |
1978-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1979-12-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd6b78835e5d186dfac93bbbb176383e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a5eb3174fe6fd482bb6e9c2b2e74d476 |
| publicationDate |
1979-12-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4180648-A |
| titleOfInvention |
Crystalline polyimides |
| abstract |
Novel aromatic crystalline polimides are disclosed that are synthesized from polyamide-acid and when heated to 200 DEG to 300 DEG C. become cyclized to afford an opaque polymer which by X-ray diffraction of the unoriented film exhibited 47 percent crystallinity. Differential Scanning Calorimetry (DSC) indicates a melt at 425 DEG C. with no glass transition in these crystalline polyimides. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9002767-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0117359-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0117359-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4444979-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1901376-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2013514466-A |
| priorityDate |
1978-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |