| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2bd1a150a400d05d54be7e1802c17184 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S507-904 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-203 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-20 |
| filingDate |
1982-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1984-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_406c09815c933dad32ebaecc1358df0b |
| publicationDate |
1984-07-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4457853-A |
| titleOfInvention |
Oil well drilling clay conditioners and method of their preparation |
| abstract |
Improved drilling fluid additives or conditioners are obtained by oxidation of sulfonated lignin-containing materials with manganese dioxide and boron addition either before or after the oxidation step. The resulting manganese-boron lignosulfonates are more thermally stable and they are rheologically suitable as drilling fluid additives. Additional improvements in thermal stability and rheological properties are realized by complexing the manganese-boron lignosulfonates with a heavy metal cation, notably, iron, preferably used as ferrous sulfate. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011171108-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4846888-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2010115199-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4655942-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8647512-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9643165-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8790615-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105565403-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5094762-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8574337-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9095837-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4755307-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010035775-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9169139-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5656070-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011174738-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010307983-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8753603-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5424283-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011171110-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010310442-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8920688-B2 |
| priorityDate |
1981-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |