| 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/C01P2004-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2002-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-11 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-70652
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B5-70647
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G49-06 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-706
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-11 |
| filingDate |
1976-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1977-12-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b48a73b06c03a42712bbd8ad701c0a88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_baf0e105830339122de12614a9abea77
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf93b9dd86b62065fba399e6ebebff71
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cff0d016acfa2f283c8f90b72ad5d14a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6c1fe4f76f13c6eb2004708ccc614f60 |
| publicationDate |
1977-12-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4061725-A |
| titleOfInvention |
Manufacture of gamma-iron(III) oxide |
| abstract |
Acicular gamma-iron(III) oxide is manufactured by reacting an iron(II) salt solution with an aqueous solution of an alkali metal hydroxide and oxidizing the resulting suspension of iron(II) hydroxide in three stages. In a first stage, at most from 0.1 to 4% by weight of the amount of iron(II) hydroxide originally present is oxidized in the course of from 0.1 to 4 hours, in a second stage from 10 to 25% by weight of the said original amount are oxidized in the course of from 1.5 to 6 hours and in a third stage the remaining amount is oxidized. After the oxidation, the goethite formed is reduced to magnetite and the latter is then oxidized to acicular gamma-iron(III) oxide. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004202606-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4344791-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5219554-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5531977-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009324487-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4221776-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8574450-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7442362-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5069216-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2416869-A1 |
| priorityDate |
1975-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |