Optically aligned and network-stabilized ferroelectric liquid crystals using azobenzene-containing diacrylate monomers
CA 2330894 A1 · Owner: Zhao, Yue · Inventors: Paiement, Nadine; Zhao, Yue
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a technique that uses reactive diacrylate monomers carrying azobenzene, groups to accomplish both the induction and the stabilization of a long-range uniaxial, molecular orientation of ferroelectric liquid crystals (FLCs) in the absence of rubbed, surfaces. The process consists in dissolving 5-10 wt% of an azobenzene diacrylate, monomer in a FLC host, and polymerizing the monomer while irradiating the mixture, with linearly polarized light. The mechanism involves the formation of an optically, induced anisotropic azobenzene polymer network that in turn, induces and , locks in the, FLC orientation. Both thermal and photopolymerization can be used. In the former case, …
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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 January 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2023.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.