Method of marking a material, marked material and verification of genuineness of a product
CA 2579745 C · Owner: Stora Enso Oyj · Inventors: Kurittu, Minna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the marking of a material (18) with identifier marks (16), the material thus marked, and verification of the genuineness of a product on the basis of the marks. In accordance with the invention an , optical brightener is incorporated in the material (18) and marking is , performed by reducing the brightness of the material at a selected location by directing local heating to this location the mark (16) thus produced , appearing with a darker shade than its environment in ultraviolet light (20). The marking is based on partial or complete destruction of the brightening effect of the optical brightener under heating. The invention is suitable for providing e.g. …
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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 September 9, 2005 and granted June 17, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 9, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.