| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_19270b178cd9a8e5903ddba33b689376 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S507-922 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-608
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-44 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K17-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-40 |
| filingDate |
1991-04-30^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_386ca58645a744313624c15d973bf2d6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_94b9e5f4b2778a0a91bf932787529847
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_931b5e1e8470c16a652e8901fcf76d98 |
| publicationDate |
1991-11-27^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2244270-A |
| titleOfInvention |
Polyimide quaternary salts as clay stabilization agents |
| abstract |
A clayish formation, such as encountered in rock surrounding an oil well bore, is stabilized with a novel quaternary ammonium salt of an imide of polymaleic anhydride. The invention is particularly relevant to hydraulic fracturing fluids used for enhanced oil recovery. |
| priorityDate |
1990-05-25^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |