| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3a5173a7d063a9f70ca7b5e86fc23863 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61F2310-00203
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61F2310-00293
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61F2310-00179 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-447
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61L27-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K6-838
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-327
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61C13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K6-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61L27-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K6-78 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61F2-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L27-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K6-838
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61C13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61C13-083
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L27-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B38-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-447 |
| filingDate |
1975-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c80da93204da5811c1a61271fa31d028 |
| publicationDate |
1980-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CH-618951-A5 |
| titleOfInvention |
Process for the preparation of a sintered ceramic |
| abstract |
A new sintered ceramic, polycrystalline in microscopic form, comprising hydroxyapatite or a mixture of hydroxyapatite and whitlockkite is prepared. The preparative process consists in reacting the calcium ion with the phosphate ion in aqueous medium and at a pH of 10 to 12 to obtain a gelatinous precipitate of calcium phosphate, in separating the said precipitate from the solution and in heating the said precipitate to a temperature of at least 1000 DEG C, but lower than that at which an appreciable decomposition of the resulting ceramic takes place. This temperature is maintained for a sufficient time to cause the sintering and an essentially maximum densification of the resulting product. These new ceramics can be used for preparing tooth repair compositions and surgical prosthesis materials. |
| priorityDate |
1974-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |