http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1280586-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7851348db19297faa07ed5a450ecbbf3 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2103-46 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-46 |
| filingDate | 1987-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1991-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f596f6e2cacb5363573bda2bd56845fe http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8aa7cc5c5c690a68e059b25e7e67ad10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e72c76b27b6fbafdc6f719e724d5f4a7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_846be9c90b555bd01e90c8b6068b78bd |
| publicationDate | 1991-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1280586-C |
| titleOfInvention | Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations |
| abstract | METHOD OF REDUCING FLUID LOSS IN CEMENT COMPOSITIONS WHICH MAY CONTAIN SUBSTANTIAL SALT CONCENTRATIONS Abstract of the Disclosure Cementing compositions having improved fluid loss capabilities for use in oil, gas, water and other well cementing operations are disclosed. Such compositions are comprised of water, hydraulic cement and a fluid-loss addi-tive comprising a graft polymer comprised of a backbone of lignin, lignite, derivatized cellulose and various synthetic polymers selected from the group consisting of polyvinyl alcohol, polyethylene oxide, polypropylene oxide and polyethyleneimine. The grafted pendant groups comprise at least one member selected from the group of homopolymers, copolymers and terpolymers of 2-acrylamido-2-methylpropane-sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acry-lic acid, N,N-dialkylaminoethylmethacrylate and their salts. The backbone comprises from about 5 to about 95 percent by weight of the graft polymer, and the pendant groups can comprise from about 5 to about 95 percent by weight of the graft polymer. |
| priorityDate | 1986-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.