| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G49-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-70663 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-11
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-706
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-02 |
| filingDate |
1981-10-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_360d48776fb768ae1bb329cf05a5b859
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_06c7097a2b2af3183998e22a10a099f3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e7bea4015179a097e067e845cf6018f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0ef4bb287e3d44ebd4e250dcc75a78f8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_73922114eebf11ce6ccfa590f04f1ef1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf93b9dd86b62065fba399e6ebebff71
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e030474948f5841ed0c05d3f11fbd0b7 |
| publicationDate |
1982-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0052741-A1 |
| titleOfInvention |
Process for the preparation of acicular gamma iron(III) oxide having a high coercive force |
| abstract |
The invention relates to a method for producing highly coercive needle-shaped gamma-iron (III) oxide by reducing needle-shaped iron (III) oxide hydroxide during continuous passage through an oven with at least two heating zones at temperatures between 190 and 700 ° C by means of a gas mixture which at Passing through an inert gas stream heated to more than 250 ° C through the organic substance which is heated in a closed container to temperatures of also more than 250 ° C and then, when introduced into the furnace, first with that in the first heating zone of the furnace at a temperature between 190 and 250 ° C from the iron (III) oxide hydroxide by elimination of water resulting α-iron (III) oxide is brought into contact with the magnetite and subsequent oxidation of the magnetite with oxygen-containing gases at 150 to 400 ° C to the gamma-iron (III) oxide . |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0200985-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0200985-A2 |
| priorityDate |
1980-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |