| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d86584bc6b724e5e1c0a4a66e8b03cf4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_86594f6f2f0cbebe0f958d27a3a4d8fd |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2111-40 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-473
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-46 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-473 |
| filingDate |
1991-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6fd52a3b7fc0cede15bfbfa40b1011b1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_130a4df54058428f486f0d2579689a22 |
| publicationDate |
1991-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0449360-A1 |
| titleOfInvention |
Lightweight cement for high pressure applications |
| abstract |
A lightweight cement composition for use in high pressure environments (greater than 3000 psi) comprises an aqueous slurry of a hydratable cement, ceramic microspheres and a foaming surfactant. It has been found that the presence of the foaming surfactant synergistically overcomes the normal tendency of the ceramic microspheres to crush at a pressure greater than about 3000 psi. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1978207-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0816300-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102008028147-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102008012084-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0816300-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5820670-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0712817-A1 |
| priorityDate |
1990-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |