| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1b7a5c546db0678dbd6f9594fc43f2d6 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-06 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-604
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-18 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-60 |
| filingDate |
2019-12-18^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3ea71764d1ba250dae236dddc909923e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_23d6ac18f24fb57dd7995f48fbd9d420
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f29a46a12b968bff8f742a3a366d5478
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3a8fec8a1f23282a5fefa916b5c681d1 |
| publicationDate |
2021-06-24^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2021189222-A1 |
| titleOfInvention |
Gemini surfactants containing an unsaturated linker for clay swelling inhibition |
| abstract |
Amidoamine-based gemini surfactants having dual chains connected via an alkenylene or alkynylene linker. Each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. A water-based drilling fluid containing the gemini surfactant is also provided. As examined by linear swelling and free swelling tests, the gemini surfactant is effective in reducing clay swelling. |
| priorityDate |
2019-12-18^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |