Photoluminescent phosphors and x-ray imaging systems utilizing such phosphors
CA 1215212 A · Owner: General Electric Company · Inventors: Ackerman, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure An X-ray imaging system includes a phosphor that exhibits a fast-acting photoluminescent response both in luminescing upon X-ray stimulation and ceasing to luminesce upon cessation of X-ray stimulation. The phosphor has the general formula A2MX6 wherein A is selected from Cs Rb, Na, and K; M is selected from Ti, Zr Hf, Te and Sn; and X is, selected from C1 and Br. In one form the phosphor has a purity with respect to naturally-occurring impurities of at least about 98.0 percent (by weight) and is sufficiently deficient of luminescent activators effective only at very low temperatures that the phosphor luminesces at higher temperatures.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 16, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.