X-ray intensifying screen with enhanced emission
July 20, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2542336 Yb activated hafnium oxide phosphor and methods of making X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing neodymium to reduce afterglow Tin-activated lithium hafnate phosphor composition and X-ray intensifying screen Titanium activated hafnia and/or zirconia host phosphor containing scandium Titanium activated hafnia and/or zirconia host phosphor containing indium Composition containing a hafnia phosphor of enhanced luminescence Titanium activated hafnia and/or zirconia host phosphor containing a selected rare earth Patent #: 4996003 InventorsApplicationNo. 556587 filed on 07/20/1990US Classes:250/483.1, Luminescent device252/301.4F, Group IV element containing428/690Fluroescent, phosphorescent, or luminescent layerExaminersPrimary: Cooper, JackAttorney, Agent or FirmInternational ClassC09K 011/67AbstractAn intensifying screen for producing a latent image in a silver halide radiographic element upon exposure to an image pattern of X-radiation is disclosed. The intensifying screen contains a fluorescent layer containing a phosphor capable of absorbing X-radiation and emitting longer wavelength electromagnetic radiation comprised of monoclinic crystals of a titanium activated zirconium hafnium oxide phosphor host. The phosphor contains in an amount sufficient to enhance emission of the longer wavelength electromagnetic radiation at least one alkali metal in combination with at least one Group 14 dopant chosen from Periods 3, 4 and 5.Other References
| |
