| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1042
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-64 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-18 |
| filingDate |
1989-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1990-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1fd9751d5a37aa7f79859731899bba3 |
| publicationDate |
1990-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4932983-A |
| titleOfInvention |
Copolyimide gas separation membranes derived from substituted methylene dianilines and unsubstituted diamines |
| abstract |
Semiflexible aromatic polyimides for preparing gas separation membranes and the process of using to separate at least one gas from a mixture of gases is disclosed. The aromatic polyimides are prepared by polycondensation of aromatic tetracarboxylic dianhydrides with 20 to 80 mol percent of a methylene dianiline which is alkyl substituted on all positions ortho to the amine functions. The remaining diamine constituent is not so substituted. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5749943-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5045093-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6709491-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0466999-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5725769-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5061298-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5042993-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5266100-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0488341-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0488341-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5013332-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0596447-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5817165-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5248319-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110606951-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110606951-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5071452-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5076816-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5391219-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0596447-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6497747-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5009679-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5234471-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5178650-A |
| priorityDate |
1989-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |