Chiral compounds III

Stock material or miscellaneous articles – Liquid crystal optical display having layer of specified...

Reexamination Certificate

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C252S299010, C252S299700, C549S430000, C549S451000, C549S453000, C549S455000

Reexamination Certificate

active

07041345

ABSTRACT:
The invention relates to chiral compounds of formula (I) wherein Y1, Y2, Y3, Y4, X1, X2, X3and X4have the meaning given in claim 1, to liquid crystalline mixtures comprising at least one chiral compound of formula (I), to chiral linear or crosslinked liquid crystalline polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula (I), to the use of chiral compounds of formula (I) and mixtures and polymers obtained thereof in liquid crystal displays, active and passive optical elements, adhesives, synthetic resins with anisotropic mechanical properties, cosmetic and pharmaceutical compositions, diagnostics, liquid crystal pigments, for decorative and security applications, nonlinear optics, optical information storage or as chiral dopants, and to a liquid crystal display comprising a mixture comprising at least one chiral compound of formula (I)

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patent: 19611101 (1997-09-01), None
patent: 9964383 (1999-12-01), None
Kuball et al., “TADDOLs with Unprecedented Helical Twisting Power in Liquid Crystals”, Helvetical Chimica Acta., 1997, vol. 80, pp. 2507-2514.
Caplus 1999: 735300.
Kuball, H-G., “TADDOLS with unprecedented helical twisting power in liquid crystals,” Helvetica Chimica ACTA, Verlag Helvetica Chimica ACTA, Basel, Ch, vol. 8, No. 80, pp. 2507-2514, XP002076376, ISSN: 0018-019X.
Kuball, H-G., “Chirality and Circular dichorism of oriented molecules and anisotropic phases,” Chirality (2000), 12(4), 278-286, XP001041318.
Seebach, D. et al., “Preparation of TADDOL Derivatives for New Applications,” Org. Lett. (1999), 1(1), 55-58, XP001041200.

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