Fluorinated oxaanthracenes and their use in liquid-crystal...

Details Fluorinated oxaanthracenes and their use in liquid-crystal... Fluorinated oxaanthracenes and their use in liquid-crystal...

2005-05-03

2005-05-03

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299610, C252S299620, C549S385000, C549S388000, C549S389000, C570S183000, C570S187000

Reexamination Certificate

active

06887533

ABSTRACT:
Compounds of the formula (I)where:X1is H or FG1-G2is —CH2—CH— or CH═C—R1, R2area) Hb) the M2-A2-R5moietyc) for example, a straight-chain or branched alkyl radical having from 1 to 16 carbon atomsR3and R4are each, for example, H, the M2-A2-R5moiety or a straight-chain or branched alkyl or alkyloxy radical having from 1 to 16 carbon atomsA2is, for example, 1,4-phenylene,with the provisos thata) when R2is not H, R1and R3have to be H,b) when R2is H, R4must not have the definitions c) or d),c) R1, R2, R3and R4must not at the same time be H.

REFERENCES:
patent: 6558758 (2003-05-01), Yanai et al.
patent: 6682785 (2004-01-01), Wingen et al.
patent: 100 50 071 (2001-06-01), None
patent: 101 45 778 (2003-04-01), None
H. Ichinose et al., “High Optical Anisotropy and Small Rotational Viscosity LC Mixture for Field-Sequential Color TN-LCDs”, Seventh International Display Workshop, Nov. 29-Dec. 1, 2000, Kobe Japan.

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