Method of aligning liquid-crystalline compound
CA 2408050 A1 · Owner: Tanaka, Kouichi · Inventors: Tanaka, Kouichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of aligning a liquid-crystalline compound in a direction different from the direction of stretching or rubbing. The method is characterized by subjecting a hydroxylated polymeric film to (a) stretching and esterification or (b) esterification and then rubbing and subsequently forming a layer of a liquid-crystalline compound on the film to thereby align the liquidcrystalline compound in a direction different from the stretching direction in the case of (a) or in a direction approximately perpendicular to the rubbed film surface in the case of (b).
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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 23, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.