Optical security element
CA 2528352 C · Owner: Schilling, Andreas · Inventors: Schilling, Andreas; Tompkin, Wayne Robert; Staub, Rene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an optical security element having a substrate layer, in which a first microstructure for producing a first optically , perceptible effect is shaped region-wise in a surface region (2). The surface region (2) is divided into microscopically fine pattern regions (21 to 40) and a background region (20). The first microstructure is shaped in the pattern regions (21 to 40) but not in the background region (20). The microscopically fine pattern regions (21 to 40) in the surface region (2) are arranged in the form of a moire pattern into which a concealed item of information which can be evaluated by means of an associated verification element is encoded as a …
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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 June 16, 2004 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2026.
- 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.