Structured colour filter and production of the same
CA 2473588 A1 · Owner: Heine-Kempkens, Claus · Inventors: Heine-Kempkens, Claus; Zueger, Othmar; Hunziker, Michael
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 structured optical element comprising a substrate having at least two regions exhibiting distinguishable optical functions. The layer systems in the regions can be divided into a respectively regionspecific inner partial layer system and a supplementary partial layer system which is common to all of the regions. The supplementary partial layer system comprises at least one layer, and the inner partial layer system is arranged between the substrate and the supplementary partial layer system in the , regions in which the inner partial layer system comprises at least one layer.
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 January 13, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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.