http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-833733-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_23694ce87aafa991eb7c53691937fbd0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G21K4-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G21K4-00 |
| filingDate | 1957-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1960-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-833733-A |
| titleOfInvention | Improvements in and relating to x-ray intensifying screens |
| abstract | 833,733. Luminescent screens. MALLINCKRODT CHEMICAL WORKS. June 18, 1957 [June 20, 1956], No. 19228/57. Class 39(1). An X-ray intensifying screen for radiography comprises a sheet of substanitally X-ray transparent supporting material and a fluorescent coating therefor said coating comprising a fluorophor which has an absorption peak for X-radiation lying within the range of 30-70 kev. and which emits a substantial portion of the energy so absorbed as radiation lying in the blue-violet-ultraviolet region of the spectrum. The fluorescent coating consists of an alkali metal iodide such as potassium or sodium iodide activated with a thallium compound, e.g. 0À1 to 1% thallium, and a binder. The fluorescent coating may also comprise a solvent in which the binder is soluble but the fluorophor is not. The binder which is preferably substantially transparent to X-rays and to blue-violet-ultraviolet light may be a polymeric substance such as polystyrene and the solvent an aromatic hydrocarbon such as toluene, benzene or xylene. The coating may also include a dispersing agent such as aluminium stearate. Preferably a thin film of the fluorescent coating is applied to the supporting material, which may be glass or Bristol board, and is covered with a thin film of the binder for further protection against air and moisture. Specific examples of screens according to the invention are described. |
| priorityDate | 1956-06-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.