Electroluminescent assemblies using blend systems
CA 2266095 A1 · Owner: Bayer Aktiengesellschaft · Inventors: Huppauff, Martin; Heuer, Helmut Werner; Mayer, Andrea
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Electroluminescent assemblies containing a substrate an anode, an electro-, luminescent , element and a cathode where at least one of the two electrodes is transparent or semitransparent in the visible spectral region and the electro-luminescent element can contain in order: a hole injection zone, a hole transport zone an electroluminescent zone, an , electron transport zone and an electron injection zone characterized in that the hole , injection zone contains an uncharged or cationic polythiophene of the formula (I), where, Q1 and Q2 represent, independently of one another hydrogen, substituted or, unsubstituted (C1-C20)-alkyl CH2OH or (C6-C14)-aryl or, Q1 and Q2 together represent …
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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 March 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2021.
- 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.