| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e08fd85d97265d6c31ab40f372843d81 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F15-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F17-265
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G21-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B9-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F17-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G21-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F15-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B9-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C13-04 |
| filingDate |
1982-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1985-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b91d860953f9d813722213b676d3e208
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e52dde01704720359368a2745d3467dd |
| publicationDate |
1985-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4519986-A |
| titleOfInvention |
Process for preparation of ultrapure thorium fluoride |
| abstract |
The specification discloses a process for the preparation of ultrapure thorium fluoride (ThF 4 ) having minimized water content and consequent maximized optical transmission of 10.6 micrometer radiation. First, thorium oxide is reacted with aqueous hydrofluoric acid to form a solid reaction product, which is then dried under controlled heating to form a hydrated thorium fluoride with a predetermined amount of hydration, namely ThF 4 .xH 2 O where x is equal to 0.39. The hydrated thorium fluoride is exposed to a reactive atmosphere of hydrofluoric acid vapor and a selected fluoride compound in the gas phase at elevated temperature for a predetermined period of time. The reactive atmosphere removes substantially all of the water and water-derived impurities from the hydrated thorium fluoride to produce ultrapure thorium fluoride which is highly transmissive to 10.6 micrometer radiation. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7560083-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005044802-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007098624-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4752454-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5098682-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H022808-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103466552-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103466552-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S62501286-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006210469-A1 |
| priorityDate |
1982-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |