Device for checking security elements
CA 2481118 A1 · Owner: Franken, Klaus · Inventors: Dostmann, Andreas; Grob, Jakob; Franken, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a device (20) and a method for making visible security elements present in an object (4) and comprising at least one photoluminescent segment which is characterised by linearly polarised photoluminescence and/or linearly polarised absorption. According to the invention, a good contrast is achieved with few interfering signals by , arranging at least one light source (1) and at least one polarisation filter (2) in such a way that the light (24) from the light source (1) is linearly polarised (23) by means of the polarisation filter (2) and hits the object (4) or the photoluminescent segments in said object and photoluminescent light , (25) from the segments …
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 March 25, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2025.
- 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.