Compound laminate containing diffraction elements
CA 2015750 C · Owner: Minnetian, Ohannes · Inventors: Antes, Gregor; Minnetian, Ohannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound laminate containing a diffraction element which, for the purpose of rendering the falsification of a document, for example more, difficult, is glued to a substrate by means of an adhesive layer, using heat. The compound laminate includes a transparent stabilizing layer which uniformly distributes the heat, during the gluing process in the compound laminate, until the adhesive layer softens. Upon cooling, the adhesive layer forms a firm joint with the substrate. By means of an intermediate layer, the stabilizing layer is joined to a first layer of lacquer having engraved diffraction elements. A second layer of lacquer masks the diffraction elements and serves as a carrier for the …
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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 April 30, 1990 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2012.
- 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.