| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be2258efa1dd0212d91e87b0487f4ede |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S516-912 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-473
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B40-0039 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B33-13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-473
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B38-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B40-00 |
| filingDate |
2000-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2008-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bddf8be3dc6a1002448d2dfc9fbf84f0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c02b54e2053816e289ff6547fd197415
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bf4cca304de26eaf7c3193def9a8211c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_549e3531115c37b28d01c51da09fe8cf |
| publicationDate |
2008-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2370718-C |
| titleOfInvention |
Foamed well cement slurries, additives and methods |
| abstract |
The present invention provides improved foamed well cement slurries, additives and methods. The additives, which foam and stabilize a cement slurry containing fresh water or salt water, are basically comprised of a mixture of an ethoxylated alcohol ether sulfate surfactant, an alkyl or alkene amidopropyl betaine surfactant and an alkyl or alkene amidopropyl dimethyl amine oxide surfactant. |
| priorityDate |
1999-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |