http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1175647-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G21K4-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K11-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K11-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K11-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03B42-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G21K4-00 |
| filingDate | 1982-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1984-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1797a4b1c83b1fdeda32a1e638e6e69f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_38dbc2250cdbe55258be12395ac9038a |
| publicationDate | 1984-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1175647-A |
| titleOfInvention | Fluorescent compositions, x-ray intensifying screens, and processes for making same |
| abstract | Abstract of the Disclosure An x-ray intensifying screen comprises a support having thereon a fluorescent composition comprising: a) from 50 to 90 percent by weight of a substantially isotropic phosphor which 15 excited by x-rays and substantially transparent to light emitted by said phosphor; and b) from 13 to 50 percent by weight of a polymer having an index of refraction within .02 of the index of refraction of said phosphor over at least 80 percent of the omission spectrum of said phosphor, said support having an index of refraction up to or equal to 0.05 units higher than the index of refraction of said phosphor and having a reflection optical density of at least 1.7 to light emitted by said phosphor. The screen is highly transparent, and further exhibits improved contrast and resolution. A preferred fluorescent composition useful in the x-ray intensifying screen comprises: a) from 50 to 93 percent by weight of a substantially isotropic phosphor which is excited by x-rays and substantially transparent to light emitted by said phosphor; and b) from 10 to 50 percent by weight of a polymer having an index of refraction within .02 of the index of refraction of said phosphor over at least 80 percent of the emission spectrum of said phosphor, said polymer com-prising: i) from 5 to 99 mole percent of recurring units having the formula: wherein: R1 is H or alkyl; and R2 is alkyl, cycloalkyl, aryl, aralkyl or aryl substituted with alkyl, alkoxy or heterocyclic; and ii) from 1 to 95 mole percent of recurring units having the formula: wherein: Ar is arylene; R1 is H or alkyl; R3 is H, alkyl, aryl, or aralkyl; and R4 is H, alkyl, alkoxy, amino, halogen, sulfide, sulfoxide, sulfonate or heterocyclic. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4762998-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4999505-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4778995-A |
| priorityDate | 1981-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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