| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7d66f6c7de1119f517957d4c7f3e4702 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08H6-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-203 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-18 |
| filingDate |
1978-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1980-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a733a22a9878360d61268b7b42040258 |
| publicationDate |
1980-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4219471-A |
| titleOfInvention |
Lignosulfonate derivatives |
| abstract |
This invention relates to lignosulfonate derivatives and alkali metal salts thereof derived from sulfite waste liquor that has been subjected to alkaline oxidation, hydrolysis and partial desulfonation with subsequent resulfonation; and followed by one or more addition and double decomposition and reactions thereof; as well as the method of cementing subterranean geological formations penetrated by well bores utilizing these additives in well cementing compositions. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013133706-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013133705-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4728727-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5290357-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4450106-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2022118255-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5370181-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4367094-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015034359-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4384997-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011065832-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015034360-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015034357-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4719291-A |
| priorityDate |
1978-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |