| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03d0f52bb4069f8a19d70dcfb697c67a |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-2991 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y25-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01F1-11
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01F1-0063
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-70678 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-714
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-712
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-706
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-11 |
| filingDate |
2002-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2004-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7089c4a5347ec431435a6c191352f24d |
| publicationDate |
2004-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6689455-B2 |
| titleOfInvention |
Method of producing hexagonal ferrite and magnetic recording medium using said hexagonal ferrite |
| abstract |
A method of producing hexagonal (system) ferrite, wherein the hexagonal (system) ferrite having an average tabular diameter of 10 to 40 nm and a coercive force (Hc) of 135 to 400 kA/m is treated with an organic compound containing a polar group having an acid dissociation constant (pKa) of 4 or below and/or a salt thereof when the ferrite is recovered and washed, and a magnetic recording medium comprising a support having thereon a non-magnetic layer comprising a non-magnetic powder and on the non-magnetic layer a magnetic layer comprising a ferromagnetic powder, wherein the ferromagnetic powder comprises a hexagonal (system) ferrite magnetic powder having an average tabular diameter of 10 to 40 nm and a coercive force (Hc) of 135 to 400 kA/m and being subjected to treatment with an organic compound containing a polar group having an acid dissociation constant (pKa) of 4 or below and/or a salt thereof. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9251832-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003129402-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6939575-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8841009-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8681451-B2 |
| priorityDate |
2001-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |