| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d97cb748898aa080b013f7f35bc8b434 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F11-22 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-22 |
| filingDate |
1992-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1994-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3c79a361160a59a944d5ffae773cc55f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bc72cd5a6ef137358b6d87af13db7f8d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ae2c50d7fe51f90ce087c65a1a537cba
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86f213d5e5e40c6535c86efe57c3d98c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dbdc59deaf4c4959145334d3bd50a4e8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e18ca82ce16737279342186ffaa577e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c645e5212654aa9c4af4401c36221aae
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_24164a267162464ae73599589a79511e |
| publicationDate |
1994-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5362461-A |
| titleOfInvention |
Method for recovering calcium fluoride from fluoroetchant |
| abstract |
Calcium fluoride with high purity of very small content of unreacted calcium carbonate and silica is recovered from an etchant mainly composed of hydrogen fluoride or hydrogen fluoride and ammonium fluoride. The etchant is reacted with calcium carbonate with transfer directions of the etchant and calcium carbonate being controlled within a composition region in which mole equivalent ratio of ammonium fluoride/hydrogen fluoride is specified. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009180947-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6338803-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6670281-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9764963-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115367975-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11437248-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115367975-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2017301435-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5928426-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008124267-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004018369-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005084442-A1 |
| priorityDate |
1991-10-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |