Method for purifying prpres from a biological sample and applications
CA 2319687 C · Owner: Commissariat A L'Energie Atomique · Inventors: Deslys, Jean-Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for purifying PrPres from a biological sample to be used for qualitative and/or quantitative determination of the PrPres in said sample. The method essentially consists in: (1) incubating during 30 seconds to 2 hours, at a temperature less than 80 ·C said biological sample with a buffer solution A comprising at least a surfactant in an amount ranging between a quarter and four times the weight of the biological sample and optionally a protease to form a suspension S1; (2) adding to said suspension S1 resulting from (1) a buffer solution B in an amount sufficient for thinning said suspension which buffer solution B consists of a solvent or mixture of solvents …
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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 February 16, 1999 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2021.
- 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
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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.