Source-to-sample distance independent efficiency technique for x-ray fluorescence analysis
CA 2211062 A1 · Owner: Nabais Conde, Carlos Alberto · Inventors: Ferreira Dos Santos, Joaquim Marques; Maia Pereira, Jorge Manuel; Nabais Conde, Carlos Alberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A technique to make the detection efficiency in XRF systems, less dependent, on the source-to-sample distance is disclosed. It is shown that this dependence can be made more constant within a large range of distances if a properly calculated annular mask is used. The calculations for this mask were made using the Monte Carlo method to compute the response curve of a full transmission elemental annulus with variable radius, and a linear programming Simplex method to optimize the uniformity of the response for a combination of those elemental annuluses. Experimental results (for Ca Ti, V and Zr), in good agreement with the calculated ones are presented and show, that constant efficiency …
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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
- Filed August 4, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2019.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.