Method for producing and visualising an optically invisible mark
CA 2445443 C · Owner: Nizienko, Jury Konstantinovich · Inventors: Nizienko, Jury Konstantinovich; Dykhne, Alexandr Mikhailovich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to methods for recording and reading information hidden against a visualisation and can be used for visualising hidden images (marks) which identify an object and protect it against non authorised reproduction (falsification). The inventive method for producing and visualising an optically, invisible mark consists in the following: an optically invisible image of the mark, is formed on the surface of a studied object by modifying at least one area of said surface. Said image is then visualised. The surface of the studied object (carrying the image) is pre-treated in such a way that it is mirrored prior to forming the optically invisible image of the mark. The …
Read the whole patent
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 April 26, 2001 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2023.
- 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.