| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b051f9f7933c758e66f6ceda5c9fb2cc |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2103-0035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2103-0036 |
| classificationCPCInventive |
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/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-2652
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-44 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-487
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-46 |
| filingDate |
1988-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1989-01-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d36730e8667e6cbf1e0235ada400f376
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dc3c74dabbb4bb1b938d040e20664152 |
| publicationDate |
1989-01-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4795770-A |
| titleOfInvention |
Cement composition for oil well drilling holes containing high molecular weight poly (vinylamines) |
| abstract |
The inverse emulsion polymerization of a monomer of the formula <IMAGE> wherein R and R1 represent hydrogen or a C1-C4 alkyl group, using a surfactant system having a hydrophilic-lipophilic balance value from 4 to 9, an azo-type free radical initiator and certain hydrocarbon liquids to yield a water-in-oil emulsion of a homopolymer of at least 106 average molecular weight, the emulsion having a viscosity less than 10 cps, at 15% solids, 60 rpm Brookfield and 20 DEG C. Also disclosed is the preparation of poly(vinylamines) of at least 106 average molecular weight by acid or base hydrolysis of the homopolymer emulsion. Also disclosed are cementing compositions for drilling holes containing the poly(vinylamines) and demonstrating superior properties. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5545904-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5134176-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4964463-A |
| priorityDate |
1986-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |