Conjugated polycarbazole derivatives in organic light emitting diodes
CA 2344084 C · Owner: Morin, Jean-Francois · Inventors: Leclerc, Mario; Levesque, Isabelle; Py, Christophe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1. An Organic Light Emitting Diode (OLED) includes as active material a conjugated poly(N-alkyl-2,7-carbazole) derivative described by the formula: (see above formula) , wherein n is an integer of about 3 to about 100 and R represents a , substituant that is a linear or branched alkyl group containing 1 to 22 carbon atoms or , poly(ethyleneoxy), cyano, aryl, amide or benzoyl. Such OLEDs have improved light , emitting properties, especially in the blue and red regions of the spectrum.
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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 12, 2001 and granted July 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2023.
- 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.