System for amplification of a fetal dna species
CA 3012120 C · Owner: The Chinese University Of Hong Kong · Inventors: Poon, Lit Man; Lo, Yuk Ming Dennis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention features a method for determining methylation status of a cell-free human DNA species in a biological sample that (1) contains cell- free human DNA originated from two different human individuals and (2) is obtained from one of the two different human individuals. The method comprises the steps of: (a) treating the cell-free human DNA from the sample with a reagent that differentially reacts with methylated and unmethylated DNA; and (b) detecting the presence of a methylated version and/or an unmethylated version of the cell-free human DNA species in the sample thereby determining methylation status of the human DNA species in the sample.
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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 30, 2002 and granted August 10, 2021. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2024.
- 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.