Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds thereof, and the use thereof as dopes in liquid-crystal phases
CA 1290755 C · Owner: Ohlendorf, Dieter · Inventors: Dubal, Hans-Rolf; Wingen, Rainer; Ohlendorf, Dieter
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Its claims, description and drawings are in the Canadian Patents Database.
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Chiral aryl-2,3-epoxyalkyl ethers or the corresponding thio compounds, and the use thereof as dopes in liquidcrystal phases, The novel compounds are aryl-2,3-epoxyalkyl ethers or thioethers or the corresponding thiirane compounds having a mesogenic aromatic component and a chiral component having a three-membered heterocyclic ring wherein, in, the general formula (I), (I) the symbols have the following meaning: R1 = straight-chain or branched (C1-C12) alkyl where one, or two non-neighbouring CH2 groups may be replaced by O or S atoms, A = diazine-2,5-diyl or diazine-3,6-diyl X and Y = O and/or S, and, R2, R3 and R4 independently of one another = H, straightchain (C1-C10)alkyl or branched …
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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.
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- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
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