| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3492a7406879265b1f567f37d98dbbaf |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S250-02 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01V5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01T1-178 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01V5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01T1-178 |
| filingDate |
1978-01-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1980-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2b1ef8881df5c7f03332f96a63cc7b2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9c62113e73cfc58634ada0851b5cf48 |
| publicationDate |
1980-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4186303-A |
| titleOfInvention |
Exclusion of alpha particles from thoron in uranium detection |
| abstract |
Alpha particles emitted from radon 220, a daughter product formed from the decay of thorium, are prevented from reaching an alpha particle detector by enclosing the detector in a volume into which alpha-emitting radioactive gases can only enter through a semipermeable membrane at least about 10 mg/cm 2 in thickness. The enclosed volume must be between 30 and 2000 cm 3 and the (AP)/(VL) ratio must be between 10 -7 and 10 -5 . Also, the detector must be positioned so as to expose it to gas from the membrane for a distance of at least 2 cm through a solid angle of at least one steradian. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013180399-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4800272-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4700067-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5229610-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9023132-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0051054-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4975574-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9018586-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011163237-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4960998-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4782234-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4757201-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4587847-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8274056-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-8301309-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5311025-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2267965-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9214170-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4468558-A |
| priorityDate |
1978-01-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |